Wouldn't it be simpler to designate Chat as where people go if they want to post pollyanna, nicey nicey posts where they expect only agreement and no widening of the subject?
Even as I say this, I think it's a nonsense but it's also a nonsense to pretend that news is separate from politics. Why do we have newspapers defined and self defined as left and right wing which is a result of who they're owned by and who buys them.
I can't believe that GNHQ think this is anything other than a hornet's nest as demonstrated by the direction of this very thread. Social media creates debate, that's why groups on, for instance, Facebook have rules and moderators and closed groups where debate can be tightly controlled. This is an open forum.