I started to notice this problem through technoratti and decided to see what's here on extjs.com. I already notifed Jon but Don't want to flood his inbox with these other ones.
These guys are actually using their profiles as a way to get spam out. Very smart if you ask me. They don't need to post on the forums. They have a bigger reach just having an account! You guys should have these words blocked for user account names in VB.
Check this mamajama out.