I have never pickpocket-ed at all. I really don’t know how to, but I was reading a book about it – well, the book was about power, but there was this little section about observation.
Pickpocketers love crowds where there are signs that say “Beware of Pickpocketers.” As soon as someone sees that sign, they check the pocket that they hide their wallet in – giving the pickpocketer the location of said wallet. The art of pickpocketing is knowing which pocket to pick. Pickpocketers have been known to bring their own sign to trigger the pocket check.
What is the lesson in this? I have no clue. The pickpocket identity is characterized by someone that is great at observing and looking for the right clues.