MyBB Community Forums

I notice that someone just sign up a username on my site, never post. I know the reason recently, because, click their username, user profile page has a like to his website. so they sign up, provide a link to his web. I don't want to show his website on my web.

http://mybbhacks.zingaburga.com/showthread.php?tid=356
http://mods.mybb.com/view/homepage-control