Breakfast Topic: Is the Zombie event too PvP for PvE?

First of all, let me be clear. I love the Zombie Invasion. I have spent hours trying to zombify towns and won't be satisfied until all of Orgrimmar is hungering for brains. I adore the comaraderie with my fellow players when turning each other into zombies and defending ourselves against those do-gooder paladins and priests. And I love that this is a pre-expansion, lore changing event.

But there have been complaints. Someone I know thinks this is the worst thing to happen to WoW. Her specific complaint is that this event is allowing players to "grief" their own towns on PvE servers. She believes that the zombies should not be able to prevent people from completing quests -- even if it is only temporary.

What do you think? Should the PvP component of the event be removed for PvE servers? Or do you find that the fun outweighs the drawbacks?