I do this too -- I use boring black cable ties, but they're the really long ones so that it's obvious when the TSA has opened my stuff. BTW, Susan, I think the "no locks" thing has been going on for at least a year or longer. (The only thing is that now I have to remember to keep something in my carry-on -- like heavy-duty nail clippers -- to cut off the cable ties at my destination ... I don't want to dull my pocket-knife by sawing at that plastic!)