I was a professional pollster (or at least market researcher) in a past life. I used to answer most any question from pollsters simply because I knew what I hard time the people on the phone had. Not any more.
I've seen results twisted to fit an agenda by the client even when I, as the researcher, did my best to remove bias and leading questions. Too many polls today are bad in that they are designed to fit a preconceived agenda. Companies trying to sell products generally do it right. They are spending their own money and someone, or at least someone's budget, will bear responsibility. Southwick Assoc. does monthly polls for the gun industry and I participate in those for that reason.
Political polls are agenda driven and need to be avoided like the plague they are.
"What kind of man would put a known criminal in charge of a major branch of government? Apart from, say, the average voter." - Terry Pratchett