If AoC included pick-pocketing.
It would provide a nice motivation for PvP besides merely bashing each other because you can, and would provide a neat in-city activity that accords with the environment. It'd also give a reason for those guards wandering around.
Heck, what good are those guards? Early on, when I first entered the Noble section of Tarantia, I thought I could run to the guards when I had bad guys chasing me, and the guards would do their job and take them out. Boy, did I learn quick.
Anyway, I think it'd be a cool addition, including having NPC pick-pockets.