Some of them keep coming back like "GodViagra" but once a username is banned the site knows the IP Address of the spammer and it won't let that IP log on again under any username.
That's actually bad news for the guy who accidentally got banned as he was a regular user. He logged onto a spammer post and got banned along with the spammer.
So anyone reading this, Don't reply to any of the spammers. Myself or one of the other moderators will get to it and delete it. It doesn't hurt to let it stay on the forum for a couple hours. Believe it or not, I do have a life other than this forum although if you ask the wife she'll say it ain't so.