I would never describe the TSA in the context of “civil liberties.” Air travel is a private industry, so it would seem to me that THE AIRLINES should be pushing back hardest against the TSA. If Walmart had police outside the door groping customers before they enter the store they’d be out of business in 24 hours.
TSA saved the airlines from future lawsuits. If they got by .gov, then that’s too bad. But, if they got past private security the airline might be held responsible. Airlines love it.