My favorite when travelling Europe is the NASTIEST cane I can find. O bokken with a rubber cane knob epoxied on the ent works GREAT, and I toured Amsterdam, Germany, Switzerland, and Austria with a "Bubba Stik" (Google) from Texas. Only on ONE connecting flight did they take it from me, and I did not need it sitting on a plane, anyway. They immediately gave it back as I disembarked.
A few cops asked me what it was for, and I just said, "Very Bad leg!" and limped for a while.
A Bubba Stik is 100% lethal and lawful. I love it! I took the knob off and imbeded it in Devcon 2-ton epoxy. I did not trust the brass screw.
A big Maglite might not be a good exuse at noon. A cane is.