In no way am I defending celebrities and the special treatment they get almost everywhere they go.... BUT...nice
nothing like cutting the line in front of a bunch of kids just because you are a lousy entertainer....
...letting them skip ahead actually gets them in/out more quickly and doesn't allow for large crowds of people to swarm them and make a big scene. By letting them skip to the front, the theme parks are actually trying to lessen the hassle on the normal park guest.
Now, if the celebrity has a very large "entourage" with them, I would have a problem with that. So with the Busta Rhymes example, I can see becoming aggravated.