In my experience, if you're in central Paris, it's pretty much impossible to avoid ending up in someone's photo library. There are so many tourists everywhere, you just get used to all the cameras going off -- and with the Olympics just a few days away, it's going to get even crazier. I get asked to take people's photos all the time too -- got asked by a large family to take photos of them in front of the Fontaine Saint-Michel just yesterday