At La Piazzetta not a half hour ago two old geezers sat down at the table immediately next to mine. I took out my little Nikon CP5400, and used its flip out LCD screen to frame the scene. Since I was staring down intently at the camera in my lap and not at them, they had no idea I was taking their picture, even though I wasn't more than three feet away.
P.S. Yes, I know. By any objective measure I'm an old geezer too. But by God I don't feel like one.