>If you have to defend a meeting from disrupters, you can either assault
>them or call the cops. I don't see a problem with either option. And
>if you're not prepared to defend your meeting, you shouldn't be having one.
The assault them yourself option is best I think. More predictable. Otherwise you might get a scene like the one at the beginning of Baader Meinhoff Complex:
http://www.youtube.com/watch?v=SFuYzhk5He0