"Giving consent" is not what is happening. The government has mandated that I be treated like a criminal because I want to get on an airplane and travel freely around the country of which I am a citizen. There is no consent when there is duress.

Undergoing TSA screening is like paying a ransom to a kidnapper. If I pay the ransom, my ability to fly is returned to me. If I do not pay the ransom, my only recourse is to appeal to the entity that is tasked with protecting me and my rights. That entity, unfortunately, is also the kidnapper.