I have read about people offering to talk pictures of couples on their camera - then, after the picture is taken, they request payment of $100 or more & hold the camera ransom.
We have not had a loss from this, but it makes one wonder how long it will be until the Europeans catch on to this scam.
I read about this happening in Hawaii. Last month when we were visiting Oahu I saw many times where people turned over their cameras to let others take their photo in Paradise. No, I did not see the scam take place, but understand how it could easily happen.
Just back from Rick's sold out talk in Houston on March 5, 2015 about the differences between American and European cultures. Many points to ponder. Guess they'll need to find a larger venue next time, but the cathedral seemed pretty big to sell all seats.