I agree and disagree with this, if we could have a 'new comers' chat room which they could only talk in, and members who are not 'new comers' couldn't talk in (other than staff), then that'd be great, IMO.
But I think what made me prefer DevBest over R/Z originally is the chatbox, its great to interact with others and great to have the occasional argument with a new comer. (Jokes, or am I?).
I'd say making some sort of three-strikes-out system, matching certain words such as "plusemu" or "retro", after an x amount of violations you'll get kicked (/banned) from the shoutbox and messages deleted. However I would filter out links (for example when someone links them to the Habbo section).