While I’m very much in favor of a No Fly List in principle, the way it is implemented is just obviously unconstitutional.
I get that if you make the list publicly available, or even only available if you ask if you are on it, that lets potential enemies know they’ve been identified and possibly infiltrated. There’s a reason why certain pieces of seemingly inconsequential information is classified, because if the enemy knows we know, then they know we’ve put a spy in their ranks. And depending on the information, it might be easy for them to identify WHO the spy is. But this has real-world impacts on real people, and if you have no idea why you are on there, that you are even on there, or how to get off of there, then that is horribly unconstitutional.