You are quite wrong. There is a mountain of evidence that so called "no-fly" lists have prevent unspeakable acts of terrorism and violence.
It is however important to note that to divulge the details of said evidence will expose state secret and thus constitute a threat to national security.
To explain; in order to protect you, the national citizen we have to keep this secret from you as telling you how we do things can put you at risk. Given that you can now clearly see how you yourself put your own well-being at risk your personal freedoms should in fact be revoked for your protection.
A secret court that we cannot tell you about already ruled in our favor. All your rights are belong to us.
Your democratically elected and chosen government.