I understand your need to ruffle through peoples luggage in the name of security every now and then. I also appreciate that you, unlike the Chinese, take the time to leave a little note saying that you'd been having a look at my.. well, frankly, dirty laundry and toothpaste.
However, for the sake of simplifying your work, I have one slight suggestion:
If your employees would try actually opening the bags the usual manner before resorting to breaking the lock with a screwdriver, it might save a few seconds per bag.
For my particular type of bag, the course of action to do this is as follows:
1. Grab hold of clasp (doubles as a locking mechanism) with either hand.
2. Open clasp by moving said hand, still holding the clasp.
3. Release clasp.
Repeat this three times.
For extra credit:
4. Make sure to fasten the clasps after you're done with my underwear. If you had to open three clasps to gain access to the bag, chances are that there'll still be three to close once you're done with the bag (bags are funny in that way)
I'd do an illustration of the workflow here, but I'm afraid your comment form doesn't seem to allow submissions by means of crayon on a napkin. Imagine a crude drawing of a bag with a happy face instead of a sad face and you're not far off.
All the best,