Have you been using Beta AB ? Well, if so, that may be the reason - a whole gang of us were on Beta over Christmas and as the site sllllllllllloooooooooowwwwwwwwwwwwweeeeeeeeeeeeedddddddddddddddd right down, we all kept pressing the submit button. Trouble is, the bots here on AB thought that we were all *spamming* the site and banned us. I only got out of the dungeon a couple of days ago, I tell you I seriously needed a bath !
Just create a new user account, say Wixed1 (you may need another email address) for example and in about a week, you should be let out.