I think its unreasonable to assume they can task employees to watch all of the chat on all of the servers all the time to ban spammers. They are working on chat filters to prevent the spamming from happening among other things to prevent it. If they can't spam the accounts they stolen or bought will become worthless to them. As far as botters go, get proof and report them. The game just "launched" and they probably have their hands full with other things.