We know from past experience that of course the TSA will find ways to misuse FRT. Images will be retained for "quality control" purposes, then misused by some employees to mock others. Passengers who don't properly bow down the TSA "authorities" will be harassed, penalized and forced to miss flights for TSA's entertainment purposes. Well connected contractors will make money on the equipment sales. Then when that particular well has dried up (passed the shortest possible "useful life time"), the new and improved equipment will appear for purchase.
Why would this particular effort be any different from past "security enhancements"?