I don't think there is an excuse for it. I do know how hard it is to not repeat doing when it was done to you as a child or in your formative years, for some reason--a lot of strong people probably have, so just generalizing here--but I'm assuming a lot of them that act this way have been treated just the same and for some reason, want to make people feel the same way they felt (could be way off base here, too). I have learned most actions are either an extension of love or a cry for love (not my words, someone smarter than me put it that way) so the people that do that are really struggling themselves, but it is hard to see it sometimes, when peoples' actions can seem just seem completely inconsiderate or mean.