Many of the elected US Congressmen are avoiding their constituents. They are using the outbursts at other Town Hall meetings as an excuse not to go home.
Personally, I find this outrageous. If you're unable to face your constituents, in the face of controversial legislation, then you do not belong in the role of a US Representative.
These representatives make a lot of money to represent us, and there is no excuse for this. If they were able to accurately and authoritatively respond to these questions, the tone of these town halls would be a lot less shrill. You can't expect people to react well, when their questions are answered with fluff.
Likewise, I have a message to each of those groups for and against this healthcare measure:
To those opposed: You're winning. The TEA groups are now being vilified and smeared, and the left-wing goon squads are out. Even all of that isn't working, which is why the Congressmen are now just canceling their town halls. You should keep up the pressure. However, the irony is that similar actions by anti-war protesters were condemned by the right. Remember that many of those people were just as passionate on that issue, as you are on this one. The most effective way to keep this alive is to be sure to keep this as civil as can be mustered.
To those in favor: You're generally the ones all about free speech, or at least until someone speaks against you. Get over it. People are loudly against something. And the next time you have an anti-war protest or whatever, use the actions as examples of why those on the right can't ignore you.
Freedom of speech is a wonderful thing. The solution isn't to stop having the town halls, or to hide from your constituents, or to intentionally pack the halls with those who agree with you.
Set better ground rules for the forum. A questioner has 30 seconds to ask a question, and one 30 second rebuttal. Ta-da! Someone can still be uncivil, but it'll only last for 1 minute.