It's an interesting one, I depends entirely on who you are talking to, and I wouldn't say it is generally unacceptable, whilst out quite a lot of people know that I am a very right wing Tory, primarily because I met them through one of the other Tories, and most people happily look over that fact, or reserve judgement until they know what I actually believe (it's slightly unbelievable how many people have started drunk political discussions with me recently).