the notorious list

If the government can revoke your right to access firearms simply because it has decided to place you on a secret, notoriously inaccurate list, it could presumably restrict your other rights in a similar manner. You could be forbidden from advocating for causes you believe in, or associating with like-minded activists; your right against intrusive, unreasonable searches could be suspended. And you would have no recourse: The government could simply declare that, as a name on a covert list, you are owed no due process at all.
—  Mark Joseph Stern, Hillary Clinton is wrong about the terror watch list