I'm all for more social features, but the amount of advertisement spam in the global chat would be insane. It'd be mostly venue spam, and otherwise dead, assuming they don't allow free trials to use it(because if they do it'll be RMT spam all the time). I don't think there's any criteria you could make that RMT bots couldn't handle.

I'm all for more communication channels, but this seems poorly thought-out, with the OP coming up with vague ideas of how to prevent abuse that have no depth.