Here is a link how to handle TEA party crashers.
http://www.rossputin.com/blog/media/RallyDisruptorsFlyer.pdf
More info here:
http://michellemalkin.com/2009/04/14/tracking-the-tea-party-crashers/
My advice would be to ask them if they have ever read ‘Atlas Shrugged’ and then to tell them that you have read the book and it is now a reality show in America. Then just walk away.