After the Covid-19 situation is no longer grabbing headlines around the world, it will be a better time to seed the foreign media in the countries where these FAMs flew (and perhaps even violated the host countries' laws when engaged in their purchases in the host countries) to highlight that trusting armed flying foreigners may not be all that a good idea even when they are operating under color of authority of their home country.
These FAMs who are willing to violate the laws of their home country can't really be trusted to abide by the laws of their host/destination/transited countries. And that's something that matters for people in the foreign countries with flights that have US FAMs working them.