Stupidest thing you've done on Steam?

Carefully checked everywhere that Payday: the heist had never been in any bundle, bought extra copies during Steam sales in order to finally create non-bundle GAs and raise myself above the $30 tag, given two copies away, enjoyed about 10 days of $78 CV then seen it plummet back to the infamous $30 again because of some russian temporary discount that happened weeks before my purchase. That was stupid, wasn't it? Got it, won't do that mistake again.

Got Scammed...

Bought Shit Loads of Games..
Don't have a Good PC to run it :D

Out of 400+ games,I hardly played 15 games xD

Bought Civ V gold for like 30 bucks a couple weeks before the humble bundle.

brought infestation warz with 3575GC.

Bought Dust: An Elysian Tale, Giana Sisters Twisted Dreams, Deponia, both Book of Unwritten Tales games, and many others. They were released on a bundle later.
During free weekend of COD Ghosts: on the winter map, I went into the cabin, went into the bathroom, crouched down on top of the toilet, and shot people as they walked past the door.
What I learned: for people that are terrible at FPS games, just sit on the toilet and camp and you will be fine.

Anytime I buy a new game it is a stupid thing to do. Hoarded almost 500 games over last 4 years while I spent 90% of my playtime playing Counter Strike and League of Legends. Well, at least I do support developers even though I will probably never play most of the games I have bought.

Traded bill hat for awesomenauts key

Till today im crying

Got a pre order of heroes of might and magic VI, didn't play it for 2 years. The next time I boot it up the very next day it goes on sale for $50 bucks less with a DLC I didn't have.

bought key to open a CS:GO case, worst 2$ spent followed by earning a 0.10$ item

Paid $10 for Two Worlds ....

Well i opened a lot of Cs GO cases and a big lose at total:DAt least i supported big tournaments arent I?

Borderlands 2 preorder. I thought the first was okay, but the second was a waste of money, and I didn't even get it on a good sale.

Sell a 10 dollar card for a tenth of what i meant 1.000 instead of 10.00

Been there, done that.

I have Arkham City and Arkham City GOTY as separate entries for some reason...

And One time got on Max Payne 3 multiplayer without turning my trainer off. Thought I was awesome, nope I was just a dick.

Oh and I bought a bunch of redundant dlcs for Borderlands once, even though I had the season pass, and steam just went right on ahead and let me.

It was Xmass of 2004 when i first played Counter Strike Source. I activated it on my ucles account wich only had like Half Life in it. He let me keep this account cause he said he was never gonna use it. Now after all this time, with the release of bioshock infinite, deusx human revolution and other games that require steam, he took the account and changed password. I had to switch to my junk account and rebuy everything.............

Bought games that won't run on my computer, as a noob tried to buy earbuds on TF2, and tried using a gamepad for a FPS multi-player game.

I pre-ordered HomeFront for the full retail price. Now, it sits in my library and laughs at me. There is some good that came from it, however. I no longer pre-order games blindly, and that has saved me from buying things like Aliens Colonial Marines, COD Ghost, etc.

Craft a badge

Used an Arma Complete on my steam account when i already owned all the titles

you can just write to support and they will revoke the doubled games and the key will be avaiable again

I bought McPixel.