The forum is a very strong believer of free speech and freedom in general. The ability to create alt accounts is necessary to allow free speech. If you limit what an alt account is able to do, you are in effect limiting free speech.
oh c'monnn Quicky, this ain't even about free speech... Someone' has a maneuver to cheat in competitions and you're covering their ass?
As I mentioned, this thread is in meta, so it is specifically regarding forum rules, not rules of a contest.
I also reviewed the OP more closely, and it does not even alledge that the person involved made multiple submissions in the contest. It merely says that someone is an alt of someone else.
I think it is pretty ridiculous to suggest that someone should be disqualified from a contest by virtue of forum rules soley for the fact that they have more than one account. I don't think someone having two forum accounts entering into a contest is "cheating" by any reasonable defination.
I don't know who airfinex is, and frankly, I don't care. But the OP has not even made an alligation that he has done anything wrong.