I dont think Michael had agoraphobia because he was still able to be around big groups of people like stadiums and such. Social phobia? Yes I do think he had that, but of understandable causes, I would develop social phobia too if I was brought up in the limelight and didnt like my own looks. Ive always thought Michaels performances was a part of acting, he did not need to feel insecure or shy when he was dancing because it was all part of an act, the crotch grabbing and all.. It was all an act, and maybe it made it easier for him to perform if he kept in mind to keep his stage image and off-stage image seperate. Off stage he was shy, on stage he let his wild side loose. Not uncommon at all.. I can be shy when Im at home, but when I go to a job interview or to work I put on this act and ''become'' really confident and a good speaker so that no one can sence my insecurities.
I think Michael felt that way too.. He put on this really tough image, like Bad and other references so that people wouldnt pick on him, he had this tough exterior and even though he was shy on the inside.. He wanted people to know he's not to mess with.
Maybe Michael was social phobic through different stages in his life... Fed up with paparazzi... Fed up with newsreporters and interviews.. Fed up with courthearings.. Fed up with people betraying him, not being able to trust people who hurt him once, twice and then yet some more.. Constantly surrounded by fans, bodybuards, security guards, housemaids, managers.. Theres so many aspects of his life where he had to deal and interact with people. I wonder was there ever a time he had alone-time for himself?
I think Michael was pretty remarkable for maintaining his sanity considering how long he had to live in the spotlight and the chasing and the madness. If I was Michael I would have probably isolated myself and quit the business in my mid 20's and changed my name. People who say Michael was crazy are in my opinion crazy themselves because they have no idea what he had to endure and he never lost his ground, remained down to earth and remained sane. Sure, he built Neverland to have some privacy, he wore the masks... But I would too.