londrum - 1:28 pm on Jan 11, 2011 (gmt 0)

i've found that stopping people posting links (or anything containing http, www, url) in their first couple of posts works well.

if a member is new, and they include a phrase like that, then just block it at source -- and don't up their post count either. that way even if the bot comes back and posts again, every subsequent post will be rejected too.