I agree with you, LM. He may be worried about his privacy as well. So many actors cannot go anywhere without people hounding them, the tabloid press continuously following you, etc. Some of these stars can't go to dinner, go for a drive, swim in the ocean or a lake, go shopping without people all over them especially the photographers, tabloid reporters, etc. I don't know. I can see both sides of the story. However, I think that sending autographed photos by mail wouldn't present him any problems. Next to Lucy and Aslan, he is my favorite character in the film.