Do y'all set your shin orientations to be negative when bending back, or positive because it's technically moving the way it's supposed to?

[thomasstuartanimation]

I want my orientations to be the same, so I feel most animators would recognize that shins bend backward, and thus are moving negatively. Just curious how others do it.

[thomasstuartanimation]

That said, you wouldn't be able to scale all rotations to make the leg scrunch up..... Now that's a conundrum.