Most of the non Duke fans I interact with seem sure that Coach K avoids hostile arenas to protect his win/loss record.
I understand that they're trying to imply that Coach K cares too much about his legacy or whatever, but I'm not sure why any coach wouldn't want to protect the win/loss record. It may seem weasely or whatever to other fans, but if you play a tough but careful OOC schedule you will climb in the rankings. Then when you lose a few conference games you have some room to drop but still remain solid in the rankings. And the rankings matter come NCAA seeding time.
That said, I have always wanted us to have at least one or maybe even two OOC games in hostile arenas. I think it serves to toughen up a team win or lose. And that could help us when the ACC games come along.