People started digging too deep, trying to unmask him, so he pulled the plug. I admire the people who do know his identity but kept it under wraps: kind of like a geek code of omerta.
Bingo, this is, as an acquaintance of _why, the main reason. Though I think it is more complicated than just one thing. Before when he got outed he was able to talk to the person and get them to respect his anonymity, but this time around the person wouldn't budge. He wanted his artwork to stand on its own, and has his reasons and I respected them so that's as far as it went.
