Wait. Alternate account are never supposed to comment or post? That is not right.
Their only purpose is for joining some sort of game clan for multiplayer in which you use that to log on and speak in game. Otherwise, they are not supposed to exist and thus are not allowed to comment or post on the forums, games, or other user's profiles.
You posting on your own account is seen as abuse of the alt account and AP farming.
Let's see. Alt accounts have always been troubling to moderators, but after the massive invasion of new users, as well as the idea that it was a good idea to make clan-accounts, it was added to the rules that all alts was prohibited to show any kind of activity (forums, game- and user comments, ratings). Before that, it was still a ground for banning if you posted on your own profile with your alt, not just because you are talking to yourself, but also because points was gained for no reason.
Leaving this, sockpuppeting is just a goddarn bad idea. In its most pure form, you have alt accounts that pretend to be other people that will, for example, back you up in an argument. Obviously that would create trouble really fast. The most common sockpuppetering on the site is people that make a - newbie alt that ask some questions, which then allows the main account to look smart while answering the questions, create an alt to break rules on the forum (and possibly have the main account comment on this or 'try' to get the alt to understand the rules), and when people think it is alright to talk to themselves.
Besides that, alts are just trouble and a quick way during a ban to get an even longer ban, if they use the alt during the ban for any reason.
Anyway, that was a bunch of alt. Either way, all of which you are asking about has been in the rules for almost a year now, and there has been a thread up about it. If you have been away from the site, it is always a good idea to check if something has been added to the rules.
It kinda in the TaC you agreed to when making an account here on AG.
c.) Users are permitted to create ONE alternate account for each multiplayer game with the sole intention to join a "group" or "clan" with that group or clan name as part of their username. However, these alternate user accounts are NOT permitted to post messages in the forums, on game pages, or on other user profile pages. Each alternate account you create MUST be linked in your primary account's biography, and each alternate account's biography must link back to your primary account name in its profile area. The alternate account profile must turn off profile comments so users may not leave messages on that account. Failure to comply can result in removal of messages, as well as temporary or permanent bans to the accounts in question, with or without notice, at the sole discretion of Armor Games. We reserve the right to limit each player to one alternate account per multiplayer game, and reserve the right to prohibit any user from creating alternate accounts.
Also, I got banned without warning. Administrators should at least warn people before they ban them. What happened to me wasn't right.
Some offenses are bad enough to warrant a ban without warning. Also, mods can warn and ban as well as admins. The only difference is that mods can't perma-ban.
How am I supposed to know where they are. I have only been a member of Armor Games for a few months.
Actually, I would not consider the TaC to be a warning. The TaC is a document, not a warning. A warning is a comment on a user's profile by a mod or admin saying that a rule was broken by the user.