When the Canadian Parliament passed legislation requiring gun owner licensing and gun registration a group called the LUFA was formed, held rallies across Canada with the rallying cry "Come and go to jail with us", dared the government to come and arrest them all.
A couple of Canadian provinces passed legislation prohibiting the national government from enforcing the new law within those provinces.
On the final date allowed for registering guns LUFA members descended on government offices, taking every parking place for miles around before opening time, and lined up. There was no way to process them so they were turned away. Members all gave each other notarized statements attesting to the fact that each had attempted to comply with the law, but the government declined to accept their registrations.
The government next decided to allow registrations by mail. LUFA members were advised to fill out the 3-part registration form and keep their personal copies, purchase a postal money order for the registration fee and keep their copies, then throw the originals in the trash. No one would ever be able to prove that they had not registered their firearms.
LUFA continued to force the government to release information on costs and compliance, using the equivalent of Freedom of Information Act court proceedings. Government officials stonewalled, knowing that the costs were many times what had been promised and compliance with the new law was pathetically small.
It took about 15 years of continual active civil disobedience, but the entire law was finally overturned and repealed.
There was never more than about 15% compliance, and even those weapons that had been registered were never completely entered into the database.
They estimate a million semi-autos in New York now. I doubt that more than 50,000 will be registered 5 years from now. New York certainly doesn't have the budget for prosecuting 900,000-plus citizens, nowhere near the courtrooms/judges/prosecutors/etc to handle the caseload, and no empty jail cells waiting for the newly convicted gun owners.
If New Yorkers get organized and are willing to stand together in opposition to this new law there is no possibility that the legislation can ever be more than words on paper.
In addition to active and peaceful civil disobedience I suggest that New Yorkers get together in organized groups, each with a lawyer on retainer, plead 'not guilty' to any and every charge brought, demand jury trials, and flood trial courts with every conceivable legal motion in every case. Within a short time the judges and prosecutors will be begging the State Assembly to repeal this stupid law.