Many years ago, about 1976 IIRC, I flew into Heathrow with my Praktica LTL, etc. Flying out of Heathrow to Charles de Gaulle the security folks saw my home-brew battery pack for my flash - couple feet of zip cord between the flash with dowel AA dummies and a plastic holder for 4 D cells, the holder in a plastic shoulder bag. They froze and demanded that I turn it on, which I did. I then realized that, with the Troubles still active my home brew battery pack could have held enough C 4 or whatever to take down the plane! I apologized, and they relaxed.
In London there were signs in all the Underground stations and trains urging riders to report unaccompanied bags, back packs, etc. We went into an Irish bar for a pint, and I decided that as a blue eyed blonde with a very English name a bar with a jar for IRA contributions wasn't the place for me.
On that trip, a week in London and a week in Paris, I shot 100 feet of home loaded Ektachrome which I then processed. No damage to the film from X rays, and wonderful slides. It will be good to have Ektachrome back with us.
Much more recently, after 9-11 I went through security at Atlanta. I had my Pentax LX and its lenses, etc, with me, and the security folks asked that I turn the camera on. I replied that it was a film camera, and they seemed cool with that. Good thing, the camera was loaded, after that I made sure that the LX was unloaded when I flew.