Contrary to popular belief, DJI has no say over what Adorama and B&H sells and as is true the other way around, they can't force Best Buy and Amazon to sell them. DJI is a Chinese company, they can't dictate what an American company does. It's...
Add my vote to contacting the FAA. Try to get as many of your affected neighbors to contact the FAA as well. If you can, get some video of the drone. I know it's happening at night, but even a somewhat dark and grainy video could provide...
Worse case scenario, and Congress doesn't come to their senses and cooler heads don't prevail, there won't be any firmware issues.
The only real issue with what you're wanting to do (I know many who have brought their drones in from other...