Is There a Locker in an Airport?

i'd rather trust people than get poop on my bak. If you're buying a plane ticket s you can get into a place and steal bags. What about tha te lockers? You can put your effects in there. Oh, those keys though. Never mind. It's exactly i'm talking about, a covey hole. Sort of like the a, the the e, the shoe cradles and macdonald's plate. I would want there to be some security though, but tat there's no waytoto sterilize that security,. Even with a net, like a pin that you have to recognize.