> the topic of TFRs/NOTAMs annoys me to no end even when just flying a drone. Tons of junk, hard to parse and keep track of
Like many unusual situations there are usually at least two things that need to happen to cause the scenario I described:
1) Ignorance to TFRs/NOTAMS (Notice to Airman for those unfamiliar).
2) Loss of communication with the correct air traffic control.
When air traffic control notices these people violate airspace they always try to reach them via radio. In the event they're reachable it's "we have a phone number for you". When they go silent it's send up some fighters AND "here's a phone number for you".
> Most of GA is low altitude anyway so in reach of cellphone towers.
This is frowned upon. When airlines ask you to turn off your cell phones it is for two real reasons:
1) Pay attention to the safety briefing (no one does anyway, and no one turns their cell phones off).
2) The request of cell carriers. From what I understand cellular devices at altitude with significantly better line of sight are somewhat problematic to the towers as devices are able to attempt connection/association to many more than they usually would. Apparently combined with the faster speed the carriers don't appreciate this. Of course they deal with it with all kinds of means in terms of directional antennas, etc but like I said I've heard it's an issue.
I point out #2 because there's likely little industry support for the approach you describe. Additionally, you add an additional safety issue because users (pilots) will learn to depend on them and the variability of cell connectivity at altitude, weather, speed, geography, etc is uncertain. Aviation doesn't like that.