Um... that's not exactly what you're warning against.

That was a case of the Russian government using carfentanyl as a chemical weapon against terrorists - irresponsibly killing 120 of the people they were supposedly trying to rescue.

Are there any other cases in history where aerosolized carfentanyl has been used as a weapon? Is there a case where an unauthorized person or group has used aerosolized carfentanyl as a weapon? Like, ever? Or is this another one of those wild theoretical attack vectors that people have seen in movies and are utterly convinced are imminent and inevitable? Like suitcase nukes and binary liquid explosives and electromagnetic railguns with x-ray scopes...