Personally, I like the idea of forced RP. You want PKing? Go somewhere else; there's no shortage of players over at Classic or Graal2001... Anyway, true RPGs don't work if you have complete freedom. Imagine what Final Fantasy or Zelda would be like if you could kill off all the main characters whenever you wanted.
We could have things like Priests and Mages to enforce rules in specific kingdoms. And we could have server-wide law enforcers.. like, in the US, there's the FBI for overseeing the whole country, and there's regional police departments for each area. Just give them some more old-fashioned names. Administrator could become Executioner, for example.
