:o That is why there would be ways to track the theif... And on top of that they wouldnt be able to steal from your character when your logged off... Maybe your house... But not your person...
There could be doors and windows with high level locks. In ADND the most simple of locks is soo hard to pick that most theives alone cannot pick them. So the most basic of security measures could be hard to do even for a simple thief.
This could also form a way to insure items. Have some magical house augmentation that locks items to the house. and a special button has to be used to unlock each item. That would curb the paranoia on house theft... And also be a gold sink...
Also a theif should get a mark on him for each person he steals from. That way that person alone could openly pvp the theif.
Oh heres a super idea for PVP... Allow WA characters... they have PVP... Almost the same class structure is set up for them... You'd just be undead.
Have some speed penalty or something, but with class mods and techs could be equal to a player version...