They have mentioned a couple things in interviews, one being a built in spam filter at launch. They have also stated they will have behind the scene tools to track gold movement between characters so that they can monitor where gold is going and see what is being exchanged for it.
Hopefully their spam filter will be more efficient than the one EQ2 uses, perhaps they will even make it so after X number of spams the player is kicked/temp banned. I know I can get up to 15 tells in an hour in Eq2 and the next day the same spammer sends me more. >.<
Gold tracking should be interesting, again hopefully it's more effective than EQ2.