Chat is chat... I'd like to have a global chat, too. Yes, there'd be the people who lack any measure of courtesy for others. We have to deal with them every day in our lives. We need better tools than policing what people might say and leaving banning accounts from using a service as the only option for dealing with a matter. If you start kicking people out, it's not really a global chat anymore, just a "people we can tolerate" chat with a line drawn somewhere arbitrarily.
I don't want to derail the conversation and turn it into my personal rant on Discord, so I won't. I'll just leave it at what I've said already.