Unfortunately because NW was a proper Release and not a mod like MM. The common courtesy and Etiquette that was seen in MM (and one of the reasons I loved it so much) has deteriorated due to the "masses" coming in.
In MM their was less trolling/tk and more politeness because the Mod was harder to find and wasn't as common a knowledge as NW is.
I miss seeing "sorry" after someone gets TK by accident. Now all I see is either no apology or the guy being TK'd gets his rage on.