Odd. I have been traveling a couple hundred thousand miles a year for the last nearly 10 years and usually with a flashlight or two. Often Surefires. Never had anything more than a "what is this" - "Flashlight" - "oh okay". And that maybe twice, most of the time, no mention at all. I currently have both a Semi custom Fenix with a Leef body and a Streamlight in my bag and not issues. Been to Japan, Taipei and a few other places in the last couple months with no issues anywhere, including JFK.