Here's a suggestion for Thursday, something I'm going to do here in Boise. Make a sign that says something to the effect of "Party Crasher", "This person is not a Tea Partier", "Party Imposter", etc. with an arrow pointing down. Be sure to put the sign on a stick. Then, if you see an obvious disruptor, simply slide up beside him or her, and hoist your sign for all to see. If you see someone who is obviously a disruptor talking to a TV crew, slide in behind them and hold your sign where it can be seen over their shoulder.
Scouts Out! Cavalry Ho!
Good plan! I like your sign idea.