When others assume you share their political views
I am interested in knowing how others handle it when they are in a social situation in which other people wrongly assume your agreement with their social or political views. This happens to me quite often in part because I live in a city where politics are a bit of a local obsession. I never bring the topic up, but it often is brought up by others.
My usual response is, "Actually we're not in agreement on that, but I'm interested in your viewpoint". It goes over like a lead balloon.