In DC.....WE HAD this infiltration problem....Gathering of Eagles....Several Viet Nam Vets dressed in black leather motorcycle gear surrounded perpetraitor.....politely took their sign / poster, and tore it up in little pieces and handed it back.
Intimdation of appearance and numbers, preclude any violent reaction.....you don’t pull on supermans cape...you behave.
You can also smile and make polite comments.....”you reaally don’t want to be here, do you ?” and provide a polite / silent / 6 person Escort group surrounding and shadowing their pathway...always polite...smiling.
Yelling also works....but NO TOUCHING while Screaming.
I like the approach, but I also think there’s an opportunity to expose ACORN for the radicals they are. If the signs are taken away and the person escorted out without exposing their identity, they’ve still created a smear on regular folks opposing marxism. The reporters can say that organizers are trying to hide their dark underbelly - the real driving force behind the tea parties - versus showing clearly that person was an ACORN plant used to tarnish the regular folks...