WmM3,
Why do you think DocJohn is mysterious? He's really been an open book here about his motives to help a bunch of stranded BT users. His picture and his bio are easily available. He even found it amusing when posters photochopped his picture in various hilarious states.
He's here a lot to participate. If you're concerned about something, just check out his info he's posted so far or ask him a question... he's been VERY straightforward, honest and forthright in all the discussions, questions, and yes, even the suspicions that have been posted about him.