Watch the movie. I just did and what you are saying is not accurate at all.
Reality matters, go familiarize yourself with it before being so authoritative.
All practical jokes are essentially bullying. There are no exceptions to this rule.
I wouldn't call the gentle deception of something like temporarily taking a plastic apple from a close co-worker's cubicle shelf and replacing it each day with a larger and larger apple "bullying". The premise of this movie is absolutely trashy, but I think good-natured practical joking is at least possible.
While a lot of practical jokes are, it's for sure possible to do practical jokes that I'd file under harmless fun. The tv program Just for laughs is --somewhat surprisingly-- really good at this. Excuse the awful laugh track and jaunty music, but a good example is how they turned an air horn prank into something fairly harmless: https://www.youtube.com/watch?v=Mb2VZ6lp8f0