NN was a mistake it feels for the most part. Though it's nice to help new players and returnees/see them get help. But over all NN just turns into WoW's trade chat and borders on Barrens chat every now and again. Diabolos NN can be at times a cess pool of over inflated egos, trolls, and the rare kick happy mentor.
IMO, SE should have put more ground rules on the NN and not just left it up to the mentors, cause mentors rarely ever agree on things, and that mentor arguing probably sucks for the sprouts who just want a hand.