Originally Posted by Kremmen

1) The TSA will smash open locks (breaking your private property) and confiscate items (stealing your private property) during checked luggage searches that occur out of your sight.

2) There are sometimes "random" searches at the gate, even after all the other searches.

3) Non-passengers are prevented from entering the majority of terminals to see passengers off or meet them coming in.

(The irony is that we have no constitutional protection in Australia, yet we can travel ID-free and without any of the above intrusions, because they would be unacceptable.)