In 1986, likely very few of those in the parking lot saw the Judas Priest television appearances that predated British Steel.
Someone from the Judas Priest organization was very smart to re-release the older videos in the MetalWorks set after Rob Halford came out of the closet in the early 1990s. "Don't say we hid anything - it's right there in the 1970s videos if you cared to watch them - flowing chiffon clothes and everything."
I mean “Hell Bent For Leather”?!?!?! Come on.
Also Freddy Mercury went Leather too, dead giveaway.