"I only wish we could train the pigeons that live on the cornices of the buttresses on the walls of the church to fly in formation Air Force style and drop their "payload" on any personages whose claim to apostolic succession is extremely questionable.."

That would be brilliant. But since it's not possible (damn!) I'm seconding the passive resistance suggestion. Just sit down in the church en masse and refuse to budge. So long as you keep it legal, there's nothing they can do.
~Weaver