A simple rule to live by. Think of the contents of what you are readin/watching an make a judgement call. A lot of people feel that they are entitle to do whatever just because of freedom, etc. But follow your instincts, normally they don't fail you. If you feel uncomfortable watching QAF on a plane then don't. Don't do it just to prove a point.

I am not sure as to which QAF you are referring to the US or UK version. I certainly wouldn't watch the UK version in a public place. Though I enjoyed every minute of it when it was shown on national TV in the UK (Channel 4), prime time, at home.

The UK is more relaxed about sexuality than the US is, so it also depends where you are flying and what you're watching.