Maybe the guy was ATF and trolling for someone to slap the cuffs on? Maybe he was a really rich guy with a good lawyer and was trolling for ATF so that he could take them to court and finally put an end to the infringements?
Or maybe he doesn't believe that laws could be that stupid, and has no problems with guys named Bubba.
Or maybe he doesn't believe that laws could be that stupid, and has no problems with guys named Bubba.