A. Point still stands. Just because you can't make a 100% perfect law doesn't mean you shouldn't try to curb a problem.
You're still holding to the idea that keeping certain people from getting guns is something that the government a) could do, and b) SHOULD do.
I disagree, completely.
B. Don't get mad when I blow your sad argument to pieces like a Glock trying to contain a hot .40 S&W round.
We'll have to agree to disagree on that one. But please be assured I'm not angry with you.
C. There is no intrustion. Your criminal record is public record. If you don't want people seeing what crimes you commit, don't commit them. I never said it was a one-time check. You would be checked every time your license or ID renews by a background check system approved by lawmakers and constituents. You are required to show ID for gun purchases, like it or not. These are the laws of the land and have been upheld as constitutional.
First, "...
You are required to show ID for gun purchases, like it or not." No, I'm not. Not for a certain significant type of transaction I might choose to make. One bastion left of actual freedom in how we trade in weapons. All I must do is not "know or have reason to know" that the person is prohibited. That is VERY important to preserve, now, and to reestablish for all gun sales as we are able to do so.
Second, so your state-issued ID is going to declare if you're a prohibited person, and now you're required to share/check this when you sell a gun privately.
The way things stand in the great majority of states, an intrastate sale of a firearm is NO ONE's business but the buyer's and seller's. That is right and good and proper. There is no requirement that a buyer or seller DO anything specific, check anything, see anything, or know anything about the other. The law is very specific about that. That is as it should be.
You're wanting to add a legal requirement to this, put the government's nose into it, and now introduce something that -- since it is a legal requirement -- someone can break the law for NOT doing. That's WRONG and BAD. By introducing this checking requirement you're putting a stumbling block into the path of GOOD people that will trip some of them up (there will be folks who break this law even accidentally and go to jail for it) and you're not taking even a tiny step to cause more difficulty to those people who the government allows to live next door to us, but who aren't supposed to have a gun...like, pretty please with a cherry.
As I said, it is my fervent belief that no one should have to know anything about me to buy a gun from me, and vice-versa. Add anything that is legally required and you add an element of coercion (you MUST do this thing, or else) and policing and enforcement that can be used against folks.
That is bad and wrong. As I said, you're pulling in the wrong direction.