The big deal is it's not Microsoft's server. We're talking about private servers. Owner sets the house rules, not Microsoft. I was going to put a clever analogy to other products here but why bother. If you claim not to understand why this is a problem, you're lying.

And as someone who hangs out here you must know they aren't going to stop at "adult content". In fact I'm sure they'll allow content many parents find objectionable for kids. They certainly wont ban rainbow flags for pride month.