I did bring up the idea of a cable lock used in the car for those situations where you can't take it with you. I never said it would be a good idea to tether it while it is installed in the dash. I don't even think it is possible because of the size of the kensington lock. The best solution is to tether it to the lower part of the steering column and hide the empeg down there.
I disagree that hiding the deck is going to deter a determined thief. Look at Tony, he took his head unit out and put it in the trunk. The thieves saw that he had a head unit, then assumed it was either in the glovebox or the trunk and used a crowbar and messed up his car anyway.
Calvin