My first knife was a Kamp King given to me by my parents when I was a Tenderfoot in the Boy Scouts. Next was a Boy Scout Whittler. Then a Old Timer 80-T Stockman. For many many years I carried a Buck "Duke" long after I no longer needed to have some sort of self-defense. A Buck pen-knife was in my pocket when in Montreal a little lady speaking french told me it was "contraband." I picked it up out of her tray and threw it hard to the lady at the Delta counter and told her to put it in my bags. The lady speaking french and the two fellows wearing police type caps didn't like it. But apparently they couldn't do anything about it. I still have the knife. In 1998 I was burned. For a long time I could not open a normal knife. I found and bought a little Benchmade Auto-Benchmite. Very cool. Excellent daily carry knife. Bought a Benchmade Presidio for heavier work. Very excellent knife.
On the day Gulf War II started, I began a trip with a group of pastors tracing the missionary paths of the Apostle Paul. We understood clearly that one could not carry any sort of knife through customs. I left my knife at home. Some of the other fellows didn't seem to get the message. They found out that in old Europe, things are different. Now the passage of time and the ruinous rule of those with a Chicken Little mentality has resulted in the prescribing of much in the name of "safety."
If and when I have to go into a place where a knife is not permitted, I just leave it at home or in the glove compartment of my car. It's no big deal. I don't like it as I find it inconvenient. I consider it overblown expression. But that's the way it is in modern life. You just have to deal with it.