Why do people care so much about fake giveaways?

I don't know. I see people complaining about points but like you said, it doesn't really matter. You get them back ridiculously quickly anyway.

Internet points are valuable commodity in some places in the world.

I'm guessing one reason may be that some people don't like to be deceived and want to point out the behavior of wrongdoers, who disturb the equilibrium of this website, which is built upon generosity and trust.
Note: Fake giveaways are frequently deleted by the support staff after their illegitimacy is confirmed, refunding points to entrants of the giveaways.

so you're telling me i can't cash out those points?:O

They are so worried that someone else that they don't know is going to lose their imaginary points, (Which if they had read the rules they would know that you get your points back when a giveaway is found to be fake). Also if they had read the rules they could avoid their suspension and wasting the moderators time, but alas they are just really wasting everyone's time.

I think that most users who "call out" only want to show off their "skills of deduction". It's a known fact that every human being likes being right.
Probably some people more than others, so they can't control their impulse to point out something that they could be right about.

Because free points are precious

IMHO It's not about the points. But we all know it would suck to win a fake giveaway, so people try to warn others.
Statistically speaking, by entering public giveaways you win on average every 2000th-ish giveaway (my guess), so if you're the lucky guy who "wins" that fake giveaway, on average it will take you another 2000th-ish entries to win "again", for real this time. I know it in fact has no effect on your chances to win, you could enter first 3 giveaways and win them all, but on average...

If no one cared, the site would be full of them.

Mainly because it happens so often, and people who join a group like SG and then start trying to post a GA without understanding how it works pisses the smart people off. I have seen many times where someone signs up, enters a few giveaways, and then starts their own GA for like 5 copies of Skyrim, that they do not own or intend to buy, because they thought they just had to create a GA, not actually give away THEIR own copy of a gift or key. people who act before they understand...they piss some people off.

I just ignore the obviously fake giveaways. However, it pisses me off when I see a game on my wishlist being given away, get a little excited about the possibility of winning it, and then find out that there is no giveaway because the creator doesn't understand how the site works.

And anyone who doesn't understand how the site works is an absolute moron, regardless of native language. I mean, where do they think the games come from other than their own inventory?

Kids didn't get enough attention from daddy, so now they are crying at other members/mods for attention.
Honestly, after a while I hate the idiot crybabies so much more than the poor people who can't understand simple english text, and make a mistake.

because play with the illusion of people should be punished with death, instead that on sg they only get a ban :p

I understand that no-calling out rule but I do think there's good reason to avoid spending "precious" points on fake giveaways. I may be weird for doing this but when I enter a giveaway with, say, 1000 entries, I look at it as choosing to take one 1/1000th of a game. On a $40 that's something like 4 cents. If a giveaway looks, say, 90% likely to be fake, you're entering for 0.4 cents. My point is you could instead use the P on giveaways that are much more likely to be legit.
What I'm not sure about is if points are returned to entrants if a (fake) giveaway is deleted after it ended.

Looking at one giveaway right now which people are concerned about - there's about 6000 entries, 550 comments, I'd estimate less than 50 which are anything more than a generic thank you message, and probably only about 20 or 30 who are actually complaining about this rather than about the people complaining about this. 0.5% of people are crazy? That sounds reasonably low. :)

As a tule of thumb, if i see a Game thats worth more than $20 and i know it havent been in a bundle i check the profile of the guy making the Givewaya, that has saved me hundreds of points

Easy, because if I waste my points on fake giveaways, I lose points to enter in real giveaways where I have a chance to win.

I don't know about them not being in short supply - depends on your perspective. When I was new here I was regularly using up all my points. After a bit of time set in the novelty wore off for me and I started entering less. Another factor that goes with that is my library growing hugely because of wins and all the bundles/games I was buying as a result of people posting about them on here. There was less stuff that I wanted to win. When I was new though, I'd often use my points and find myself waiting for them to regenerate.

I've heard of some people 'banking' their points for future use when they're approaching 300 so they must think that they have a need to do so and might occasionally find 300 not enough at any one time.

While some of the explanations given above are sensible, it's also because many users have to pick their entries, joining a possibly fake giveaway for an expensive game they really want means giving up on other more common giveaways they might be curious about and that for some reason they have not bought yet.

This is true especially for users with small libraries, but is not necessarily limited to them. E.g. I've been trying to win a copy of Trainz Simulator 12 for some time now, which is worth 30 points; do I enter two TZ12 giveaways that have a 99.9% probability of being legitimate, or do I go for one possibly fake giveaway of that new Thief game I'd really like?

Regardless how many incredibly smart and funny remarks are made about points having no real value, there is an opportunity cost associated with fake giveaways. It might be argued that this cost is very small but it's there, because the probability of winning the non-fake giveaway (no matter how small) is non-zero, while not joining translates to a zero win probability.

In other words the expected value of the common giveaway is quite certainly non-zero, while the expected value of the big bucks game is affected by a non-negligible amount of uncertainty - something that usually tends to upset people.

edit: or in other other words, do I give up multiple small chances to win something not very valuable for one very small chance to win a very expensive nothing ?

Its not the about the points, its about principle....

It's simple: People don't like liars. If you appear to be lying, then people will call you out. Just like if you appear to be committing a crime, someone will rat (tattle) on you. It's no different.

Also, people get their hopes up when they see someone giving away 5 copies of a brand new game only to be let down by the fact that the OP is new to steamgifts and doesn't own more than TF2 and Dota 2. Sure, it's free internet points (steamgift points are free). But, it is still a let down nonetheless. It's like being pranked. Nobody likes being pranked.

Here's some FAKE keys for da ninjas

• Majesty 2 Collection - 5QQ9V-XG54L-G2TTY
• Hoard Complete Pack - B8PKE-0WLWX-BHHPK
• Forge Starter Pack - VIH4Z-TW9AF-4JQW9
• Enclave - PC4FW-P0RRP-Z2049
• Forge - GGNH0-RGQP5-8R3JN
• Alan Wake Collector’s Edition - I80KF-IPTID-TMIYM
• Alan Wake’s American Nightmare - WB9TQ-F6IDE-6K0AX
• Dungeonland - EYFYY-5KTL8-WMELC
• Dungeonland - 3PF2D-7X444-MYDTH

You sound like someone who lives on a "it happens" or "who cares" point of view, which is fair enough and a good mind set to have in some occasions. But of course people will be pissed off, If I gave a lollipop to a little kid and then ripped it away from them you would obviously think I'm an asshole. This is sort of like the same thing, I get very happy knowing that I'm entered in a giveaway for a game I think is awesome, I'm also quite thankful for the chance knowing that I have very little. But when you find out its all just someone trying to dog you over for utterly no reason what so ever. Then I'm not happy at all!! And complaining is also FREE :P.

What I think is crazy is that you came on the internet thinking that people wouldn't complain :P its the internet, someone could get a free boat and complain its not big enough :P lol.