It can apply to anyone at any time once they decide for any reason to expel you.

The ambiguity is a feature, not a bug. They decide they don’t like your opinion about X? Cool, glad you were always a guest - it’s an arbitrary enforcement lever.

Same thing for “safety”. People claimed (in the Nix community) that all kinds of things made them feel “unsafe” - including the opinions of others.

I wouldn’t get involved in a community like that and think it serves a useful purpose to point it out, in case someone else would be similarly hesitant to join such a community.