In parties and parliaments you can remove people from power. You can’t remove people from associating with your movement.
Your party leadership can publicly denounce a person and disinvite them from your party’s convention. That amounts to about the same thing.
The question here is whether a social movement and philosophy can have a bunch of representatives whose job it is to tell other people’s organizations and other people’s communities to exclude certain people.
I don’t (currently) think it would be a good idea for an official body to make this kind of request. Actually, I think an official committee would be a good idea even if it technically had no authority at all. Just formalizing a role for respected EAs whose job it is to look in to these things seems to me like it could go a long way.
Your party leadership can publicly denounce a person and disinvite them from your party’s convention. That amounts to about the same thing.
Quoting myself: