|Subject: Re: Locking Luggage|
When x-rays are used for checked luggage, it isn't too reliable; reportedly chocolates and plastic explosives turn up looking the same. For a time the practice was to page the passenger if something suspicious was in a locked bag, but if you think about it, agents don't want to be standing around waiting for a pax if they think there might be a ticking bomb in the bag.
The advisory against locking luggage came before the Christmas holidays. I put the plastic tabs on when I traveled then and found it removed in both directions, and no note in the bag but nothing missing. Supposedly they're working on providing tabs at check-in, and then TSA would replace them with tabs of a different color if they have to open the bags.