Like Halo said, stop bitching about it. They have fun, they don't do any harm.

And, like Robeatics said, they're fun. I personally enjoy going in there and trying my best to make people laugh. Most people get it and understand what I'm doing and why. Hell, most people endorse my actions. Some people don't and try to ruin the fun, but that just makes it even more fun. You should try it sometime. It could be the lube that ultimately removes the stick from your ass.