someoen who is miserable inside does that.
Not cool .. Better things to do x
It's sad! When someone makes you feel bad then get your own back!
It's really easy to do nowadays, because everyone is so busy one-upping one another in online scuffles that they've entirely forgotten how to stand their ground in person. So why not? If they have it coming to them, let them have it. And before you start really feeling bad about it, just think of it as reintegration therapy.