In my view it would be interesting however since there are no plans for slavery or confinement for a individual it would be hard to enforce such a punishment. I don't see how you can 'force' them to do the labor or stop them from just walking off. There is talk of a Jail system or a Criminal Justice System being looked at but no concrete information has been released. Give them time and I am sure they will make an announcement when they start to work on that part of the game because there are so many more important systems to get right first. I would happily support having a choice between loosing spark energy for a crime and working it off with community service though I don't know how you could enforce the latter.