I work and live in Lagos, Nigeria. I fly Delta a lot, as they have a non stop flight between Lagos and Atlanta. A lot of people that I work with (a large US Oil company) also fly Delta. Suffice to say, we are one of Delta's larger corporate accounts. I have emailed the Delta exec for West Africa and voiced my displeasure with the ban by Delta and others. I doubt that it does any good, but who knows.
I asked the guy how an airline, which is designated a "common carrier" can arbitrarily ban legal and safe commerce. What's next? Why not ban blue suitcases or green duffle bags. I then asked him if people who work for oil companies might get banned one day. Maybe people involved in fracking.
Can you imagine if a guy was involved in fracking and hunting and his hunting buddy was a certain dentist............

Might be banned for life.
I hope SCI or NRA pursues legal avenues on this. Perhaps restriction of free trade or interstate commerce. Would love for the lawyers/hunters to step up on this.
I'll post his reply, assuming I get one.