I get it: J.K. Rowling is one of the most magical human beings to walk the face of the Earth. We all love her. Like a lot.
We're also all going to be very sad when (eventually, in what will hopefully be the very, very distant future) she leaves us. But like, 1) Why are you thinking about that?? And 2) Don't tweet her to let her know, OK??
Seriously. Don't do it.