My sister’s godparents walked out on A Fish Called Wanda because they were offended by the little yip dogs getting comically offed. My parents, on the other hand, had loved the movie so much that they took my sister’s godparents to see it.
I can’t say that I’ve ever walked out of a movie. I generally don’t go to see things unless I’m reasonably sure I’ll enjoy it. That said there are plenty that I’ve started watching on cable that I’ve changed the channel on due to boredom or dislike.