I'm not surprised the congressman have who have town hall meetings not done that already.
As long as they are consistent and ONLY allow constituents in who live in his district, I have no real problem with him doing it.
Knowing that people DIRECTLY responsible to throw his ass out will be there, maybe he might listen and get a clue.
Don't kid yourself. The meeting will be pre-packed with an SEIU choir before they open the doors for "little people."