Again with the strawman. I never said there weren't any democrats in a republican's district. I said the odds are that those with extreme left wing views are very likely in the minority if they live in a republican congressman's district. Same goes for a "Tea Party" protester at a democrat congressman's town hall.
"in the minority": ie. Very likely to have unrepresentative views from the average voter / majority of voters in the district.
And again, does that make them a "Fake" or "Paid" protester when they attend their congressman's or senator's town hall? No.
And they have as much right as every other resident of the district to be heard. A congressman or senator represents ALL people in their constituency, not just those who voted for him or her. (At least that's the way it's supposed to work, although that may be my idealistic streak showing.)