Most guides tell you how to avoid becoming a potential "mark" of a pickpocket, but this one is going to teach you how to pick pockets. Picking pockets is an easy, non-violent way to make some extra money. Unlike most crimes there is little contact with the victim and violence involved at all. Even if suspected, a pickpocket can clam ignorance and just say they bumped into the person. A busy crowd, a distracted woman with an open purse and a fat wallet, and then there is some money for you to spend on yourself. Its quick and easy, plus if done properly you are long gone before they ever know their wallet is now safely in your pocket.
Don't feel guilty though, you are teaching them a valuable lesson, and that is to watch their belongings better. Pickpockets never see faces, only wallets and purses. Mothers with kids, the elderly, and distracted tourists are all potential targets, or "marks". This isn't personal only buisness.
The one thing you must have to be a pickpocket is patience. You may have to wait to find the right "mark", or until they leave themselves vulnerable. You don't want to blow your hand or risk getting caught by jumping the gun. But it is worth it, a pickpocket can make more in a day that a stick up man can in a year.