A) A man walks in the street carrying a shotgun visibly
B) A man walks in the street waving around his shotgun
C) A group of men walk in the street waving around their shotguns and various rifles
D) A man points an unloaded gun at another man (a total stranger) in the street in broad day light.
I would argue all these are crimes because you are terrorizing people, even if you never injured anyone nor had the intention of injuring anyone.
What decent gun owner would walk around "waving his shotgun"? That sounds crazy, who would do that? Gun owners are people. Like, normal good people - neighbors I would probably trust. Does your view of gun owners differ?
There was no mention of the decency or otherwise of the hypothetical people, and it didn't read like they where intended as a moral illustration of gun owners in general. Sounds like you have a defensive agenda.
>..menacing behavior like that would be disturbing the peace or terrorism as you say.
So we can observe that some of the hypothetical people, who may or may not be gun owners, who may just be gun borrowers, are probably not, in this case, decent and probably are intending to menace.
The thought experiment was meant to counter the arguments in the parent comment about whether drunk-driving is a crime or merely a "pre-crime".