On the Pokemon card theft subject, for a brief period of time at school myself and a friend set ourselves up as a kind of playground Team Rocket* and would go around (playfully) stealing other peoples Pokemon cards.
In our heads I imagine we thought we were coming up with elaborate schemes much like the real TR, however as I recall all we basically did was distract kids and grab their cards before shouting "TEAM ROCKET!" at them and running away. Thinking back on it I was clearly a bit of a dick at that age!
* I was Jessie obviously