In case you haven't seen the video, Bill Maher had some 9/11 conspiracy nuts (people who think our government destroyed the towers) interrupt his program and he had them thrown out, and not nicely. But isn't it interesting that his security guys didn't find it necessary to taze the protesters? I doubt Maher would be the type to let something like that happen on his show, but I hope all security people everywhere have been told to cool it with the tasers because of the famous incidents at UCLA and Florida, which left egg on a lot of faces.
And yes, of course Maher has the right, and in my opinion was right, to kick the protesters out. They were disrupting the show, and that is an area where private property rights trump the first amendment. Besides, it gave him an opportunity to deliver a great line:
"This is not the Iowa Caucuses, OK? It's not a debate. It's a debate [gesturing to the guests] between us. You are in the audience, audience comes from the Latin 'to listen'."