I understand people hate Aurum Vale, but that's rarely the one that it ever happens in (I only ever get it if I queue for leveling and someone happens to want to run it to level). I really don't understand why this happens so often, and I promise I'm not exaggerating. The thing is, if you enter a queue then accept the instance when it pops, you have opted to spend the next 20-60 minutes in that dungeon. There's no reason to instantly leave before anything even happens. 30 minutes is not near enough in my opinion. I'm getting a 30 minute penalty as well in that case because I'm having to re-queue since the person screwed me over. If it's an emergency, that's fair enough, but it's extremely rare that life would go 0-100 in less than 30 seconds like that. If it did, the game is the least of your worries and you likely wouldn't be on for another 12+ hours anyway.