Part of your training as a pilot is learning how to find out about stuff going on in the area where you plan to fly and who to contact about flying in that area.
If you don't know (or have forgotten) how to do that, you should not be flying a plane. Full stop.
EDIT: For some reason I can't reply to to the commenter below who pasted "met with multiple law enforcement officers and first responders".
Those are not people responsible for airspace access and airspace management, and the pilot should have known that. Its 101-basics stuff.
Meeting with law enforcement and first responders about airspace is about as useful as fart in a spacesuit.
In response to "followed all FAA regulations", well he would not be threatened with arrest if he had .... I suspect there is far more to the story than the one-sided article lets on !