They can't be original seats... they didn't have plastic seats back then. Maybe when they installed these seats they decided to have them be red seats for the reason you state, but these are not original 1950s vintage seats.
Originally Posted by Shotgun Shuba
Edith Bunker (responding to her husband's outrage that his beloved daughter was cheating on her "Meathead" husband): No matter what she done, it's none of your business!
Archie Bunker: Whaddya talkin' about, it's the world's business!
Edith: No, it ain't the world's business, neither!
Archie: Well, it's certainly God's business!
Edith: Then you let God tend to it.