As far as I know it's no problem to help someone do work on a laptop they own.
Usually, we point at the sticky FAQ topic: LOCKED OUT OF YOUR LAPTOP?
But you're not the only one to suggest there is aspecific rule or something similar.
So I've kicked that question upstairs to see what's up.
There's a big difference in helping someone crack/bypass passwords, and pointing them to the manufacturer.
As we cannot verify the owner of the PC, we are very cautious about helping people break thru password protection. The standard answer for BIOS passwords, is probably just point them to the manufacturer.