I learned long ago not to argue with those who have no idea of the real facts. Believe what you like. I never arrested knife carries but you seem to be the type to need to assume that.
Here is the link to the law about shipping them:
http://ypdcrime.com/penal.law/article265.htm#p265.10
It was not updated to remove the change in gravity knives. I have posted hundreds of times here and helped Doug from KnifeRights over the years, but you clearly are the expert.
"Any person who transports or
ships as merchandise any firearm, other than an assault weapon,
switchblade knife, gravity knife, pilum ballistic knife, billy,
blackjack, bludgeon, plastic knuckles, metal knuckles, Kung Fu star,
chuka stick, sandbag or slungshot is guilty of a class A misdemeanor."