Such people are a self-selecting group - and there is plenty of production selectivity going on as well.
There are plenty of uninformed people out there, no question.
But these entertainment segments are not truly representative of the public.
I know I would never agree to appear on camera for Leno or on radio for Hannity.
The majority of those talking to Hannity claim to not know who he is.
I'd not agree to talk to anyone on a phone just handed to me on the street.