Tacpot:
Generally I agree with your sentiments, but take issue with your example. If you are flying with someone who stalls on the approach, I would suggest that your priority is teaching him how to avoid the stall in the first place, rather than how to get out of it!! It's no good teaching him perfect stall recovery if he does it at 50 ft and powers into the ground on the recovery!
I am also uneasy about the legalities of the fact we have to sign the logbook, but I wonder whether, a couple of years into JAR, anybody has had reason to refuse to sign and what the repercussions have been?