Hm, but 3000* sids on a PK contract doesn't exactly strike me as commoner either. If you have 3000 sid to blow on killing someone who annoys you, then you are not a common commoner.
(unless you've scrimped and saved and stolen and busted butt to save that 3000 for a few RL months to spend it on a contract against your arch enemy Malik who murdered your lover in cold blod. then i'd say, that's cool.)
I always found paying people to make their life miserable a lot more entertaining than simply making them go away.
*just using the number already mentioned as an example. I do not know the going rate for a hit. it probably varies.