I don't like the idea simply because we already have a small playerbase of pkers, and this would split it down the middle. I've seen something like this work on a server I'm not going to name, where in World 1, you had the original wilderness, and World 2 was a PvP world with something like 1.3x XP rates for everything you did outside of a bank. Possibly an increased XP rate and maybe a 1.2x drop rate on PvP worlds would increase pking activity. More rewards for skillers, but also risk due to the pkers it would bring, and other pkers to hunt those pkers.
Support the idea in a sense, but I don't think it should cut the community halfway down the middle as most of the ironman/PVM playerbase would rather farm Zulrah kills than get 150k bank keys in a DMM, we should provide incentive for that side of the community to come into PVP areas also. Just my thoughts.