"The right of the people to be secure in their persons, houses, papers, and effects, against unreasonable searches and seizures, shall not be violated, and no Warrants shall issue, but upon probable cause, supported by Oath or affirmation, and particularly describing the place to be searched, and the persons or things to be seized:"
You will notice that expectation of privacy is not mentioned. You may also want to note that the Amendment guarantees your right to be secure in your person even before it mentions your house.
Isn't anyone going to mention the TSA? If you want to fly, they can search you up one side and down the other, detain you for hours or even days, and confiscate anything they damn well please.
By simply doing business with an airline (buying a ticket for travel), my 4th amendment rights vanish.
And don't tell me it's a privilege to fly. It is a willing buyer (passenger) and a willing seller (air carrier). You can charter a Lear jet and there is no TSA there to hound you.
The TSA security checks have become no different than DUI roadblocks. They can pull you aside and hound you all they want, and there is nothing you can do about it.
Your papers please...