What? Have they disabled 200?
I agree sometimes there's talk that in my opinion fits to the categories of flamebaiting, politics, religion and other prohibited topics. Then again, as some already have said, it's also a forum to greet every player, friends and rivals equally. As such it's a community strengthening thing. Closing it is like closing all the roads to prevent car accidents.
As for killing cross country PM's for their toxicity, I strongly disagree. I've sent quite a lot of friendly ones which have led into sometimes longish discussions starting from analysing the last fight to the current personal situation. By their nature they would have been safe to be typed on a public channel but some of the chat has been very personal. Not something that shouldn't be said, on the contrary, but things that are between friends only. And yes, there's people in the game I call friends even though the only way I keep contact with them is the in-game PM.