Yes, ever since....
My first job out of college was as an FO for a 105mm battery in the Central Highlands. It involved a lot of travelling around with convoys and staying at transient quarters. Every BOQ, Headquarters, Mess Hall, etc. had a red 55-gal drum full of sand covered with a sheet of rubber roofing at the exterior door, marked with a sign that said, "Clear weapons here before proceeding". Almost every barrel had a large bulge in the back, garnered by stopping a 5.56 or .45.
Ever since I've been wary of a closed action, no matter who is carrying the firearm. I don't take offence if someone checks me, and I don't really care if someone is offended if I check them. It hurts like hell to get shot, and it hurts more if you did it accidently. And if you did it accidently, it hurts again every time you think about it. Sometime, I'll tell you how I know that.