There are those in this thread that claim there is such a thing as a "reasonable" restriction on the trade of firearms. I do not. What ever you claim as reasonable is open for abuse.
And if they were abused in the contrived way you describe in your post, they would constitute infringements in my opinion. They would be open to court challenge, and if the system worked the way it should, would be overturned.
And if you're gonna look at the "potential for abuse", let's look at the potential for abuse of a "restrictions = infringements and are not allowed" regime.
Al Qaeda suidice death squads boarding airliners with freely purchased and carried MP-5's engaging in firefights at 35,000 feet. Alternatively, they could show up at day care centers or shopping malls with freely purchased and carried MP-5's and hose the place down.
People attending court proceedings for bitterly contested divorces and custody battles with freely purchased and carried MP-5's.
Convicted violent felons toting freely purchased (mail order) and carried MP-5's in prison.
And remember, I have nothing against MP-5's. I happen to like MP-5's. I shot one once and it was really, really fun.
More abuse.
Criminals could obtain firearms as easy as obtaining a can of soda pop. No questions could or would be asked.
And my favorite "potential for abuse" ......
The government, implementing a policy of not letting people out of jail until they can be trusted to carry guns could start locking up its political opponents for minor offenses on the grounds that they could not be trusted carrying guns. In addition, so many people would pile up in prisons that there would be political pressaure to engage in mass executions. The death penalty would be applied to many more offenses than at present.
And it's only a small stretch to simply make "not able to be trusted carrying a gun"
itself a "crime" for which someone could be locked up. (They would do it "for the children".)
And if you don't think that has "potential for abuse" you're dreaming. In fact, that would lead more directly to a tyrannical government than almost any infringement of the 2A.
The bottom line is that
any law or policy has potential for abuse. Some have more than others. And the consequences of some are more severe than others. So in the real world we look at the
tradeoffs of different policy options.
That's why when I look at something and form an opinion as to whether it constitutes a "reasonable restriction", one criteria (and not the only one) I use is the burden it places upon the criminal or terrorist compared to the burden it places on the LAC. I favor policies that put a relatively large burden on criminals (like not being able to freely purchase and carry MP-5's aboard airliners) while putting a relatively small burden on LAC's.