Suppose I arrange a meeting for a group with a specific interest. And then suppose people then attend my meeting who disrupt it; I'd be within my rights to ask people to leave, right, because it's 'my' meeting?
Now... does that basic principle change if a) we make that specialist interest related to race or minority issues, or b) I'm a politician?, or c) it's arranged by (e.g) a students' union?
Genuinely interested in people's views on this...