Sometimes, you wish you weren't so damned ethical. You wish it was all right to watch someone do something to hurt someone else, and do whatever came to mind, to get back at them for it. To make it clear to them that in real life, doing stupid shit like this has consequences. Karma or no karma, that sometimes you just don't do it because someone else is going to do something worse to you, in return.
Unfortunately, I am that damned ethical. So all I'll do is sit here and try to comfort the recipient of the latest stupidity, and chalk up one more proof of the source's complete lack of clue about how to treat other people decently or get along in life without constantly making it worse on themselves and everyone else.
Sometimes, I really annoy myself.