OnM: See, now a lot of the time a remark is funny once, maybe a few times, but it becomes a cliche with endless repetition. That's really what people object to. They want to experience something new, not the old same thing over and over. Simultaneously, though, they have a fear of the new. Familiarity also breeds comfort, and a lot of the time people want comfort more than they want new experiences.
EC: Seeing aliens from space blow up the White House or the Capitol building is comfortable?