One thing the GMs need to make absolutely clear is to not go into other server forums/irc/etc and tell them to come to ours. That is just a stupid idea. Right now on my other server where we have 2000+ players online at any time of the day, anyone who comes in and advertises their server gets screwed. In about 5 hours their forum is completely flooded with spam posts, their private message boxes are full, and if they posted their MSN/AIM/e-mail, those get flooded instantly with spam bombs.
So yea... don't advertise on other servers. The staff should make that a ban-worthy offense.