Mona Lisa Pick Pockets
There are groups of pickpocket artists that use this famous painting to stole your wallet. Basically, they visit Louvre and stay near Mona Lisa. They try to get people wallets near the painting because people usually use both hands to hold a cell phone or camera and the place is really crowded. So this makes really easy for these guys to stay next to you and open your backpack or get your wallet from the back pocket for example. Always be aware.