If I had a nickel for every time I wanted to say that to someone on Facebook, I think my student loans would probably be paid off by now. :P
The thing is, if it was someone I was relatively close to, I wouldn't have a problem saying it: "Okay, we get it, you're upset". But this person is kind of a tenuous connection and I know she would take automatic offense (which is part of the problem in the first place) and I'm not in the mood for the ensuing drama.