Having read what happened and all the concerns raised, yeah, I'm going to have to back out too.
Aside from not wanting to be connected with Uncle BadTouch in anyway, I'm more than a little concerned with the idea of Uncle BadTouch being used to show tension within the community too. I agree with Nigel's assessment that if we don't acknowledge our disapproval of him, it legitimizes him, and that if we do, it makes the book about him.
I'm not sure if any of you have read Lords of Chaos by Michael Moynihan, but the book is supposed to be about Satanic themed Heavy Metal. The book ended up being about Varg Vikernes of Burzum, who is a Neo-Nazi, arsonist and murderer, and up until Breivik's rampage, Norway's national asshole. Maybe that's Godwining but, I feel it's an apt analogy.
So, Dingo, I'm not going to hold your decision to include Uncle BadTouch in your book against you. If you want to grab a beer when you're in Boston, I'm down, especially when it will be around your birthday. But I don't want to be in a book that I would feel obligated to denounce someone I don't want to bring attention to.