It's like running with the scissors. I'm not sure if anyone ever hurt themselves that exact way, but any grown up person knows it's a bad idea and you should not try it (or a similar action). If the general idea can be explained and makes sense, do you really want to look for specific examples where doing the opposite failed?
You could probably check the number of questions about php's autoloader on stackoverflow to get an idea why magic is not good.
You could probably check the number of questions about php's autoloader on stackoverflow to get an idea why magic is not good.