Doing Various illegal substances.
Lots and lots of pirating. Video games, movies, music.
I stole an air head from a convenience store once.
Also I don’t know how illegal this is but as a kid there were two kids, one a klepto who stole for the fun of it and gave to others just because he didn’t need it (his idea) and the other a younger kid who saw this and thought it would get him brownie points stole a bunch of Red Bull, gum, headphones and other miscellaneous things from the local grocery store not exactly for me but I got plenty of it. They got caught eventually but since I was never even in sight of the cameras I never got in trouble.