If the organization owns the place where people meet, the organization can put someone on a blacklist, and the local community can either meet at that place without the banned person, or coordinate on finding a different place to meet at—which would be difficult if the best local coordinators are members of the organization.
If the organization owns the place where people meet, the organization can put someone on a blacklist, and the local community can either meet at that place without the banned person, or coordinate on finding a different place to meet at—which would be difficult if the best local coordinators are members of the organization.