[user104658]

Originally Posted by Livia

So kids, be as rude as you like, punch someone if they touch you, there's no need to restrain yourself or moderate your behaviour.

Literally no one has said that.

No one should punch, grab or shove anyone... and accepting any of it simply encourages more of it. It couldn't really be much more simple.

You seem to be willingly missing the point and getting wound up over the idea that it's OK for this guy to punch a security guard, when obviously it isn't OK and no one thinks it is, it's just that some of us believe that it isn't OK for bus drivers to push kids around (or for parents to use violence as a punishment) either.