@Rachel (foreverstargazer)
I understand that you don't care, however, I honestly believe that you should post the message. Not in spite, not in anger, and certainly not in retribution.
The girl in question needs to understand that not only is she;
(1) Pathetic
(2) Immature
(2) Nauseatingly annoying
but, more importantly, that that kind of behaviour is hurtful. I know that by posting what she messaged you with will cause a few people (even myself) to question her as to why she bothered to post such tripe in the first place, but more importantly, it will send her a tough love message that her pathetic behaviour is unacceptable and hurtful. As I said before, I know two wrongs don't make a right, but, it seems like said girl needs some tough love.
I wouldn't go over the top when messaging her. I wouldn't stoop to her level. I would just like to ask her what kick she gets out of sending hate messages to people over a social blog. I know I am coming across as a keyboard warrior, but I really am sick of childish people spoiling such websites like TUMBLR and Facebook in their pursuit of personal hate-filled gratification.