You can't expect this mod to be 100% balanced... If there is NPC farmers there, so be it. I don't find the need of taking out every chance of a way to earn money, just because someone else discovered an easier way to grab some quick cash than you. And if you are earning money faster, why complain? To ruin other's fun?
As far as the farming goes, I've only seen 2 people there max. It's not like half the server is crowding there... It's not like every new player is there for a day and they can get off to buy lolcaps...