Note that these are going out to people who actually tried to comply with the law, but were a couple of days late.
“Dear gun owner. Thanks for trying, but failing, to register your illegal gun. Because you attempted, but failed, to register your gun by the deadline, not only are you a class D felon, we also know exactly who you are, where you live, and what guns you have!”
Does everyone see how this works?
Stalin would be proud.