That is not yet a crime. But an automatic firearm exception to our established reliability analysis would rove too far. Such an exception would enable any person seeking to harass another to set in motion an intrusive, embarrassing police search of the targeted person simply by placing an anonymous call falsely reporting the target's unlawful carriage of a gun. Nor could one securely confine such an exception to allegations involving firearms. Several Courts of Appeals have held it per se foreseeable for people carrying significant amounts of illegal drugs to be carrying guns as well. . . .
Police do that already.
But, that's another problem. The good news is that even that atrocious rule has some limits.