I don't listen to talk radio but in passing I have heard snippets many times. I had a beloved brother (since died) who listened to Limbaugh every day, and he had really screwed up political views. The best thing about my brother was that he was willing to discuss it.

The main thing I have learnt about talk radio is the number of people who quote - as truth - what some anonymous idiot caller proposed/charged/bemoaned - those people accepted the caller's words as American policy/America's future/America's majority.