Not actually banned yet
For some reason, rather than just issuing an emergency AD or FAA order, they sent out a Tweet. Now to the masses, the FAA has already banned harnesses that are not easily released by the passenger. Dudes, as fas as I know, a Tweet has no regulatory authority despite what the orange guy may think. If you read their tweet, it says they "WILL" be reviewing these procedures and they "will" be issuing some sort of document that has regulatory authority. I hope anyone conducting these flights is smart enough to self police and get the best equipment out there to meet this requirement but beware...rushing to change equipment and training protocols often has unintended consequences or unforseen problems. I think everyone should just back off from these flights umless real pro photographers who know the risks are involved. Forget the civilians and rediculous foot selfies.