Ski locks - Do you use one?

Never used one before, but will this year having fallen foul twice last year of morons taking the wrong skis from the hotel ski room.
Not sure if it really matters about it being really sturdy though. My experience is that there is very little actual theft, more taken by mistake. So anything you can do to mark your skis as yours helps.
That said, a good secure lock that is light and easy to use and not expensive will find a market, but I doubt you would get backing from the Dragons.
Good luck though.