I think I remember hearing a while back these were supposed to be in Skyrim, and that the thief breaking into steal that dragon claw in Riverwood (that you could witness, apparently) was supposed to be something that could occur regularly and dynamically in the world.
Not sure whether accurate or not, but I'd love to see random crimes occur in the world, whether occasional drunken brawls or pickpockets. The problem I see is that is would just result in NPCs dying more frequently given the system of justice that exists in the wastes, as cool a novelty as it may be. I guess they could be randomly generated NPCs for those specific events and crimes, so when/if they are killed you're not missing out on anything.
You'd have the option to ignore, intervene, aid the criminal or alert guards (assuming any existed in that particular settlement), if the criminal survived they would disappear from the world upon leaving the cell.