when i hand my camera to someone to take a picture of my GF and I and they take like 10 shots
*cringe*
I cringe when tourists hand me their cameras. Once was a couple who asked me to take their picture. He should have said "pictures" because he kept gesturing me to take more (inside a narrow gorge with no background.) Another was a couple with a dslr, who only used the screen on the back - so I looked like an idiot raising it to my eye, and a bigger idiot holding it out at arms length.
I keep my camera in my pocket (for safety) but even so the Swiss aren't exactly social animals, so none of them would come running up and start a conversation. When I lived in Japan though, people used to talk to me all the time - at least once a week. Japan is a film-shooters paradise, though.