Depends how rude they are. Because I can understand to a degree that maybe they've had a ****ty day, and are just defensive towards fans since many of them can be a hassle especially if you've got other **** on their mind
guy I worked with said he met Val Kilmer once in Vegas. He didn't really care, but just happened to be standing next to him, and he said he acted sort of like a dick. Then he's (guy I know) looking out over the strip and says "you don't actually live in this ****ing town, do you?" And Kilmer kind of liked that and warmed up to him and they spent the rest of the night drinking together with a bunch of people.