Simon,
There would be like 5 people who wouldn't "sign up" to go on a quest, and those people don't go on them anyway.
The best idea from another shard I like to rant on about for quests is to have a .quest tag that teleports you to the quest starting area.. it worked really well, because there was a general shout out across the shard, or you could just type .quest when you logged in and be zapped somewhere; I really liked it.
But then WoD has a whole "RP but not REALLY RP" thing going on, so there's probably no chance of the game becoming like that - though just how "real" is looting corpses just as they hit the ground, while still fighting, drinking a potion and casting cure, while mounted?
Just have to wonder..
-M