Interesting article. To me, excessive "ground control", whether technically legal or not, actually works against its own intent in many cases, and reduces safety.
For example, let's say I want to fly over a local park. The local park has a no drone ordinance. But it's Class G airspace. So, I can fly in that air space legally per FAA regulations. I just can't take off, land, or have my ground station inside the park bounds, per local ordinance.
But then it's perfectly legal to operate from across the street, just outside the park bounds and fly in the park's air space. But I may be doing so from a less optimal position of risk awareness than I would be if I were from operating inside the park, where I could more easily see people, vehicles, obstructions, etc from the ground in addition to from above.