I 100%ly agree with Karyuu and DaveG on this.
KSing is exploitation of a bug, nothing else but cheating. There is absolutely no way of me to buy \"I\'m RPing evil so I KS\". None, because it is so ridiculously unlikely that a decent RPer who RPs evil does not check with the victims first, to see if they are capable of handling the victim side. This must not be forced upon players, because it requires so much RP experience and good will that it cannot be expected.
Edit: Furthermore, due to the inherent limitations of PS, the evil player cannot simply ignore the victim. Instead, they will, if the evil one really RPs, have to deal with the situation in an RP manner. IOW, they will have to enter a session with a lot of /me-ing in it. It is not RP to simply ignore the victim, that is exploitation of the limited options the game offers, nothing else.
/Edit
Anyway, I have been victim of both KSing for loot and for getting me killed, and I highly doubt there was any sort of RP involved. At least in the getting me killed situation there was no single word spoken to me, even upon me inquiring via /tell.
So basically, this supports my assumption that KSing is used solely for OOC purposes, and never for RP.
The most often unfreiendly and extremely egoistic environment makes the kill grind even worse than it already is due to it\'s dullness.
As for sharing: I also think that one should share, but I expect to be asked politely.