Why does Hannity hang up on any caller when the mention Free Republic?
Because his name is Sean "Hollywoood" Hannity.
We had a period when DU encouraged all to call conservative talk shows as someone from Free Republic; I heard a couple of the jerks, they get on and spout curses and slander. Some had posted to us that do the threads that they knew what was going on so we cooled off calling for those few days. They didn't want to accept the calls in case they got more DU imposters.