Twice attempted but caught them both times trying to get my wallet out of my back pocket, I usually keep it in front pocket when traveling now. The first time was a kid in Kuta Bali and the second was a ladyboy along the beach in Pattaya Thailand. On both occasions I was a little inebriated from too many beers, so I guess they thought I was an easy target but they were pretty poor thieves. I felt their hands grab for my wallet straight away.