Did people not experience same faction griefing? I know I did.
Griefing also wasn't limited to a pvp server. There was tons of griefing over kazzak, azuregos and especially the green dragons on my server in vanilla from horde and alliance alike for whatever faction.
I mean, it was cool when I was on a pvp server as horde where there was almost no other horde so when people attempted to grief us, at least they were alliance and we could respond.
At the same time though, on that same pvp server we had MASSIVE wars with a rival ally guild over world bosses that usually ended when one side really needed to start a raid. On the days neither side raided, they might last 6 or 7 hours.
Then again, I think there's more to wanting world bosses than just fun and environmental aesthetics. Don't know what, but I think there's something. After all, the rebuff of the whale shark and it's accompanying achievement is that there's no loot.