Except that the only time an airline is SSSS'ing people is when the name matches an entry on the no-fly list that the TSA controls or when some other criteria is met on a TSA-issued list. The TSA cannot absolve themselves from the pre-printed SSSS just by stating that the airline chose the person. The airlines don't go out of their way to identify people for screening; they only do what they are told by the TSA on that front.