First and foremost, beginning at your end, each and every GA allows for the users to comment, i hardly consider that hijacking. Just as long as no rules are broken, i hardly see it as a bad thing. :)
Regardless of some flaws here and there from a batch of users (i'm not perfect, i don't expect others to be - and i'm not referring to you or anyone in specific that comes to mind, by the way), one of the best things (if not THE best thing) about SG is i feel, its community, and their willingness to debate (as long as within the rules). To debate, argue (in a civil manner) is not in anyway a disservice to the site, to a GA or anyone in it... in my humble opinion. ;)

As for the full details, i've read them and hope you don't take this as uppity / snob, but they were not really necessary. Whichever the circumstances of your suspension, as you yourself in your detailed explanation have admitted as such, they lead to a rightful suspension, so that's all the detail needed... again, in my humble opinion. As you yourself said, lesson learned, that's what matters.

As for the most important part of your post, i don't see any harm in following Uroboro's suggestion, highly depending on you express yourself in doing so, of course, as my biggest point of contention as expressed in my first post, was and is, how so many people continuously antagonize new users creating GAs. I've even recently seen a GA description of a user that has been here for months, has created several GAs, some of them for AAA games, feel the need to open his GA description with "no, it's not fake, you can check my inventory".

I do however wholeheartedly disagree with this:

SG really needs system whereby new users are informed of how the site works before they create a giveaway.

I don't really feel it does.
If a user can't be bothered to access all the information that is presented to him in a very easy to understand information completely and easily accessible through the FAQ and such, it's on him, not on SG.
Also, i'm a bit past my 1st created GA, so i can't confirm this, but as fas as i know, whenever a user creates a GA for the first time now, he gets a few extra pop-ups guiding him in the right direction. If a user can't be bothered to read even that, i don't honestly know what SG can do. So as far as i know, the system you wish is ironically, already in place. ;)

As a sidenote, i for one, am glad we could have a healthy small exchange of views and as stated at the begining of this post, don't see it as harmful for anyone. Anyone can simply opt-out by ignoring, it's not being forcefully fed on them. ;)