Earlier quoted context omitted.
DJI products quite effectively indicate and restrict access to no fly zones. My controller starts to beep if I get within a few hundred feet of a border to a no fly zone. I haven't tested it, but I think it is supposed to come home and land if you somehow get into a no fly zone. That said, 1,700ft is so high, no fly zones don't really mean much anymore.
Drones are already forbidden by law from flying higher than 400ft.
If we assume you're referring to the United States, don't conflate proposed rules, rules, guidelines, and law, nor circumstances that require you to seek FAA authorization for the flight (which is different than "forbidden by law," itself inaccurate).
You are talking about Advisory Circular 91-57 (Model Aircraft Operating Standards) from June 1981. Not law, just standards for their airspace. Certainly not forbiddance by law.