Re: WTAF - this is bullshit
The FAA requires approval of any structure in the US taller than 200 (61m) feet above local ground level or near an airport. Musk's towers are more than twice that. Roughly the height of a 40 story building.
Of course he should have asked for approval. Assuming that they aren't actually an air travel hazard of some sort, I imagine he'll get approval. Along possibly with a (well deserved) fine?