Well this is not really the place to discuss other forums, and personally if I was permanently banned from any forum I wouldn't go posting about it on another, similar, one because it won't exactly endear you to anyone. Usually if you post a "gross picture", then a ban is no more than you deserve.

Alternative accounts are usually always created by spammers and hoaxers. Forum admins see these as a cheap deception trick by someone that wants to have a spamming account and a real account. Or someone that wants to have a fake user with which to back up their side of an argument. I was once the admin of a forum where a certain member made himself another account pretending to be a female and then proceeded to post, not too convincingly, talking to himself and others. This person was discovered instantly and allowed to continue at his own expense until he was finally publicaly exposed, when he accidentally posted with the wrong account and made a complete fool of himself.

I'm not surprised that they ignore your mails either. Sorry but that's often how things work out.

Good luck btw and welcome.