I dunno, but I always tighten pedals on the crank pretty good. Just don't like the idea of riding on anything just "finger tight". I've seen enough instances where parts get broken from undertightening because of the play that develops between the two parts.
Anyway, it will take a huge amount of force to strip the threads on a crnkarm hole by over tightening the pedals on it. And if you have enough mechanical experience, you tend to develop a feel for things that you don't end up stripping parts from overtightening.
Never had any problems taking off my pedals from my bike's cranks either, despite having them on tight.

Chombi