I'm not sure. WoW as of today looks like it's engineered to avoid the slightest inconvenience or annoyance to players. :P
LFR, LFG, bonus loot rolls, facebook minigame of garrison management, Bind on Account for all pets, mounts and Heirlooms.. Heirlooms themselves.
It is definitely far more casual than it used to be. I'm not going to whine, I understand the game needs to play to the market and I'm not going to pretend I enjoyed having to find a group in a chat channel, run to the actual instance and then grind away about an hour for resurrecting and loot squabbles that existed before LFG and Personal Loot, some of the changes are great. I suppose I'm also older and 'wiser' now (At least busier, with a 9-5 and whatnot), so this new style of WoW suits me, I can't just stay up all night playing like I used to.
They call it "abusing game mechanics" now, but personally I find the act of discovery of this sort of thing possibly the most fun aspect of games. WoW was particularly vulnerable because of the raw complexity of mechanics introduced in a short timespan.
See: Gamesmanship vs. Sportsmanship
http://en.wikipedia.org/wiki/Gamesmanship
There was another time in WoW when a mage soloed a raid by discovering they could use spellsteal to steal invulnerability buffs off of bosses. (Hey... that's what it says on the tin, right? "Spellsteal"? ;) ) Anyway... That got patched. ;)
I remember playing Neverwinter Nights 1 and somehow I was able to squeeze 1 more weapon enchant than was supposed to be possible, onto my weapon, without cheating. My monk became pretty OP :)
Another time, someone showed me how to get to the top of Ironforge. That too was amazing. Sort of meta-gaming!
That would be pretty interesting.
I don't know much about Second Life, though--I'm not even sure if you could die.
Something like this, https://youtu.be/YCc0hDuQt3w?t=72
I think for a sword fighting sim (as an example) you would put the rules into the sword (hitpoints, damage and so on). Then everybody with a sword could participate in the fight and the sword would tell you when you are dead. Presumably instead of death a sim could teleport you away from the sim.
I suppose you could also have an external object (the mastermind of the sim) track player stats, but there might be limits on how many players you could track at the same time (not sure).
Not to say it couldn't be made to work, but I highly suspect it'd just result in a pandemic that perma-deaths the player base. Could be handy if you could dope a capsuleer with a debuff though, like a stim with no upside. (Maybe pay off an NPC corp for the subterfuge?)