This argument is a distraction from the root problem that government is involved in something they shouldn't - citizens traveling freely in their own country. Only when government gets involved in something do rights and other issues like this start getting murky. If a private company ran airport security and SFO demanded you do a body scan, you would go to OAK or SJC. No chance of doing that when government's involved. Even if state government was in charge, you could decide to fly out of JFK or Newark based on preferences.
The TSA at its core is a blatant violation of the 10th amendment. In case you aren't familiar (most people aren't and for some reason most people don't care): The powers not delegated to the United States by the Constitution, nor prohibited by it to the States, are reserved to the States respectively, or to the people. Arguments like this are a distraction from the core point that the federal government should never have been involved in this at all.