There are a billion scenarios in which doing so gets you arrested even today with current laws.
There probably are. But that wasn’t the question. The question was about the danger to the public in this specific scenario. The only difference is the serial number. What significantly greater danger is the public in from the differing inscriptions stamped into our receivers?
The correct and obvious answer is, of course, “none at all”, which is why I raised the point to begin with. The fact that I could be “arrested even today with current laws” demonstrates that such laws are not actually enhancing public safety, and should be adjusted so that they don’t criminalize completely inoffensive acts.