I've been a mechanical watch guy for a long time, and I was told way long ago that turning the crown counterclockwise while in set position on a mechanical is bad for the movement.
Is this true? If so does it apply to some movements and not others, and if so which ones?
I've always set my watches forward and never backwards for this reason, but I don't know much about the technical aspects of movements so I don't know if I'm blindly following a myth. I've been forced to do it to synchronize non-hacking movements, but again I try to avoid that out of fear of causing damage.