I assume the "spirit" of the law is safety. If the FAA has determined that 250g is where the risk of a person, or plane, or something else being hit by a drone is diminished so as to not require the same regulations as drones over that weight, I'd say that keeping drones under that weight limit to avoid those regulations (and their associated safety issues) is well within the "spirit" of the law.
Agreed. They could have put other limits in place easily. I have to assume they figured battery technology would get better allowing for these advances.
