I can see why they would do that.... if they let this go through then a lot of the servers will be filled with farmers who don't contribute to the gaming experience, mobs would be scarce and you would have a hard time finding the mob you want for your quest.

I am (assuming) those farmers also wouldn't bother to play properly and don't socialize to minimize downtime, lesser people for LFG, server would become full fast and real players who want to play will have to enter queues more often.

Good for blizzard to enforce those rules.