How about adding theft and criminals to the world of RubiKa?
A special tool, in wich you can right click people to obtain their unsaved items? Would make standing in Tir With a unsaved Dragon armor kinda stupid ;D
Or some flagging for killing guards? You name turns red for a while? (*cough uo*)
Killing you own side, (that would be ganking someone engaged in a duel?) Would sorta put you on kill lists and **** lists around the world. Of course, someone would take advantage of this, and become criminals, and could never venture in a sided city again.
*shrug* if it worked for other games, why not AO, we do have guards don't we?