Peter Clark wrote:

That's clearly not the case here.

Nothing clear about it. The DC ADIZ was "temporary" when they first set it up.
The excuse for that one was an increase in the security level. Everyone expected
it to go away after the level went back down.

It didn't.

George Patterson
Give a person a fish and you feed him for a day; teach a person to
use the Internet and he won't bother you for weeks.