So, to put it simply, there's a spammer problem. The filter does a good job, and the signup deters a lot, I think, but there are still a lot of people that join and then do nothing. This wouldn't normally be a problem, but "Fred's Discount Viagra" makes me think they're a bit less than legitimate users.
So, I blocked everybody who hasn't been active in a few weeks. If you've been blocked and you aren't actually a spammer, I'll fix it, I promise. Shoot me an email at kidko @ this domain with your username and I'll unblock you pronto.
Thanks, The Management