In reply to rogersavery:
Roger, your post puzzles me - I have just returned from Espace Killy (ie Val d'Isere + Tignes) and don't recall any cameras on the few lifts that do have ski pass detection. I would have thought that it would be difficult for a picture to be taken in the general melee when passing through. Also lift attendants rarely seem to be looking closely at skiers let alone comparing photos on a screen. But I did once notice an attendant with a portable device standing next to the skiers queuing which might have been some sort of detector... Any one know?
I found it strange that there were only detectors on the lifts at the bottom in the resort or at the change of areas i.e. when Val only lift pass ends and Tignes only area starts. Swiss and Austrian resorts have detectors generally on every lift, IME.
We were discussing whether you could get a third person skiing free where 2 persons purchase passes and allow the 3rd person up mountain by taking down a pass once the 2 skiers are through, but this would be illegal of course.
Mike