Getting under the skin of prigs is always funny. I think that's a fair statement. It might not always be socially justifiable or always be the best response, but it's always funny.
Have you ever happened to find you got under the skin of someone you thought was a prig, but then turned out to be a legitimate victim?
Reality with human beings is complicated. Pattern matching simple rules is bound to produce a false positive. Have you always stuck around and gathered enough data to be sure?