I suppose I shouldn't do it, but whenever somebody calls me and asks if I would mind taking a short poll, I answer, "Yes, I would mind," and hang up.
I signed up for the national do not call program, and in recent months have been receiving very few courtesy calls.
As a matter of policy, even when I am called by a charity I support, I always say, "send me a letter." I never accept a courtesy call of any kind.
Evidently liberals have more time on their hands.