As an adult, I've beat a bunch of kids both in video games and in sports. I'm not necessarily proud about it but, it did feel good at the time.
Just kidding ;D... Maybe..
Seriously though, abuse towards anyone is not tolerated. Nothing wrong with discipline but, a lot of people seem to cross the line and not realize it. So for a quick answer, no you can't. I'm sure someone will come alone with some references.