" Why ??? " ... Hmmmmmm ... because this is an example of a disturbance that was on the verge of becoming something very bad. I've seen a couple of similar situations where I stepped in to stop them because it was the only decent course of action to do.You have to know what can be tolerated and what can't (imho).Stuff like this falls into the latter category ... Such cases of stupidity suck like maggots on a garbage truck and are best left for the land fill (again, imho).