I carry a Spyderco in my pocket all the time when home but I also travel a lot on business. So a couple of times I have forgotten about the knife but always catch it before entering security. Once in Denver I had parked in a remote lot and absolutely did not have time to put the knife back in the car so I hid it in a big plant in the terminal. I went on my 3 day trip, came back and sure enough the knife was still there. Another time in Albuquerque I gave the knife to a janitor in the terminal. He seemed happy to have. Rather he got it than TSA.