What are we willing to risk to defend our Rights?
This is a good question, and it' s a harder one to answer now than it was 200+ years ago. Back then a fellow could go find a place to be left alone if he liked without his license plates being automatically tracked and his movements stored and retained in databases unknown for durations unknown. He could publish "subversive" literature without the PATRIOT ACT causing his ISP to give him up involuntarily. He could start a religious movement without getting on an FBI list. And so on.
Your livelihood requires that you fly, but you still like the 4th Amendment? Well, sorry. That's really too bad. You have the choice to retain and fight for your rights from the welfare line. You a fan of the 2nd Amendment, whether for sport, defense, hunting, or otherwise? That's not going to go so well for you in California, New York, New Jersey, Illinois, et al. Like "alternative" literature? Don't check those books out of a public library too often (for any possible value of "often"). Because if you do that enough, you will be placed on a list the entrance requirements for which you can never know, the contents you can never see, and which has a removal process you will never participate in.
Is an over-reaching, NKVD-style TSA policy of harassing regular citizens on subways in the name of security theater the hill upon which you want to make your stand? Could be for some, might not be for others. I suspect it depends quite a lot on perspective, political/power connections, and money. For the average Joe, there's no real effective solution except to submit, or be branded a criminal. Remember, the US has become a country where 18-man SWAT teams can beat down your door in the middle of the night, Brazil-like, after having obtained a warrant on merely the flimsiest of anonymous tips.
-B