There are TSA approved locks out there. But, I don't lock mine. If, for some reason, they need to get into mine, I want to make it as easy as possible. Otherwise, I could end up with damaged luggage. There is nothing in my checked bags that I'm worried about being stolen. I mean, who really wants my socks or teeshirts!!! Anything of value goes in my carryon. Now, once I get to the resort, if I have to leave my bag with Bell Services, then I put on a lock. I don't want to have to worry about my computer or other electronics going 'missing' while in that back room. Just keeping the honest honest so to speak.