There's a time and place for discussion of what should and should not be acceptable to discuss, however, as well as how it should be discussed.
For instance, there's a world of difference between, "I don't appreciate how Mako
was treated in the third season. It felt like he was made the designated bad guy for the sake of building up the romance between Korra and Asami," and "F*CK YOU, you gender-traitor f*ckfaces! I'm going to cut off your heads and fornicate with your brain stems!"
If you want to talk about whether or not a safe space has overly strict policies on speech, that's a great conversation to have in a private office. What you should absolutely not be doing is standing in the middle of the shelter going, "F*ck these insensitive stupid bitches. They deserved to be raped." One might cry censorship at being kicked out after saying something like that, but your rights end where other people's rights begin.
Even on this board, we have people who try to discuss whether or not our forum policies are too strict or need adjustment. We have subforums dedicated to improvements and the moderators have their own places where they can discuss internal affairs. But when you're sitting in Edit Banned appealing to have your rights given back, that is the worst place
to go, "I think your policies are too strict and you should get your heads out of your asses and stop persecuting me."
Context isn't just subject matter. It's where, when, and how the subject matter is addressed.