I will nudge in the pops and to save at the outlanes.
I respect the machine owners methods. Nudge or no nudge.
If in league play and losing badly on my third ball I will nudge more aggressively. (if allowed by owner/ location)
My son and wife do not nudge at all. ( Consider it cheating)
I think that it is cheating if you tilt . That is why the pendulum is there.
If you tilt you have gone outside the rules but nudging up to there is legal.