Originally Posted by Howste

Not only is it reasonable, it's already in place. MANY airports do have a (reduced) method for precheck in regular lines. If you have precheck on your BP and the precheck line is closed (or doesn't exist) then they give you a card to show the screeners. You walk through the regular line, but can keep on your shoes and light jacket. You can use the WTMD (if available) instead of the nude-o-scope. You still have to take out your laptop and liquids bag though.