Of course, on rare occasion you do see a game experiment with unusual rulesets, such as EverQuest's 51/50 server. More recently, Realtime Worlds announced that they're contemplating a slew of unique rulesets for APB, including newbie, Chaos and pure skill. So the potential is there for servers to branch out -- it's just that, for various reasons, the risk is seen as not worth the potential reward.
But this is The Daily Grind, a place to unleash your imagination and engage the "What if?" in its full glory. So if you could create a unique ruleset server for your game, what would it entail?