one way to aprouch this could be.. when a evil action is made ex:. (pickpocket and theft) there would be a percentage no greater then 70%(could be based on lvl of skill + a stat Vs another stat/skill on victim) of going unnoticed, if it would be noticed the victim would get a splash screen informing him that he was \"robbed\" and would give him the option too.. ignore, force duel on thieve, set alarm(set alarm would be like a cry for help, were all the chars not evil would receive the option to force duel the thieve) if the thief died the stolen goods would be auto transfered back to the victim.
what a thieve would be able to steal.. in my opinion only things that wouldnt be in contact with his body (ex:. torso, boots, gloves etc..) about the amount of stuff that shows up when performing a theft could increase with skill lvl, the same with the amount of stuff one could rob, say (ex:.
player z uses pickpocket on player x!
[ player x has a 1 knife, 1 shield, 10 iron ore, 2 bars, 1 pick axe, 50000 trias ]
at lvl1 player z would see ex:.(100 trias) but if he would try to steal all he would increase his chances of being noticed but if he would try to get only 10 he would increase chances of being unnoticed.
at max lvl player z would be able to see all the inventory of player x including items that are in the body, but those would be of limit to him since it would make him noticed with 100% chance and fail the atempt