Then you haven't been paying attention.
Leftist cities/counties have been doing this for years.
The no ghost guns thing is new because people have been making homemade guns for next to nothing and then making bank by turning them in.
I will say this, if you have a non-functional firearm that has no value, either $$$ or personal, and it isn't worth repairing, its a good way to dispose of it and get something for an otherwise worthless object.
"If you will not fight for right when you can easily win without blood shed; if you will not fight when your victory is sure and not too costly; you may come to the moment when you will have to fight with all the odds against you and only a precarious chance of survival. There may even be a worse case. You may have to fight when there is no hope of victory, because it is better to perish than to live as slaves." - Sir Winston Churchill