Registration can serve a lot of purposes.
1.If it requires renewal its a way to keep track of the person's fitness(no new felonies, no new mental health issues)
This can be done without registration, such as with an ID (look up FOID). Strange that it's done in Illinois, but I think it's a good way to handle it.
2. It would make it much easier to track a (stolen)weapon used in a crime.
Somewhat true, assuming the S/N is still there.
http://www.harborfreight.com/variable-speed-rotary-tool-kit-68696.html
It really is that cheap.
3. It would make strawman purchases and sales more difficult.
Not initially. It would only make them significantly more difficult for future attempts, after a weapon were tracked to a given straw purchaser.
4. It would make it easier for a police officer to know if a person he encounters has a right to possess the weapon he finds with them.
Again, this can be done without registering the weapon. In addition, quite a few states give cards for pistol permits, and almost all, if not all, have cards for CCW. No weapon registration needed, or useful.
The biggest problem with 1-4 is the reality that it still allows illegally obtained weapons to slip through the cracks just as without any such registration, while adding frustrations for upstanding citizens and legal residents.
Provided the restrictions were reasonable, and there was an affordable method to appeal long-ago legit rights removals, and mistakes, I'm pretty sure only the very fringe would object to registering
persons as fit, provided that the permit would be must-issue, provided a little safety and shooting training, and without explicit reason to not issue (IE, they would need to have a reason to refuse it, have a deadline for issue or refusal, and those reasons would involve addiction, psychoactive meds, doctor recommendations, or violent crimes only, and that refusal could be reasonably appealed).
In the real world registration wouldn't make it easier to seize everyone's guns anyway. I don't understand what scenario people envisage where registration would make any difference.
That it has been done, and we know there are members of Congress who would like to make it happen across the U.S..
People could resist a tyrannical ruler whether they're registered or not.
Sure, but it'd be a whole lot easier all-around for said rulers not to have that information edge.
The big problem is that it's
not a slippery slope. NY's new law, while I hope it gets struck down, was a result of backdoor deals by Coumo and friends, and Coumo has actually said that he considers confiscation a valid option. Feinstein, likewise, was dumb enough to say similar things, many years ago. Others are good enough at deflecting that we know they aren't pro-2nd, but don't know how far they'd be willing to go. It's unlikely to happen, but if there isn't vigilance about it, it very well could.