Why doesn't Tony Stewart like to sign autographs?

You do not have the right to receive an autograph from a celebrity on demand.
It is a privilege the are free to refuse as they see fit.

Tony Stewart just happens to be one of those celebrities who isn't fan friendly and doesn't want to take time out from his time at the track to sign even a single autograph. In fact, he is pretty rude about it too. I watched him not only refuse to sign an autograph, but very loudly showed he was annoyed by the request.