I don't think I need to explain why I threw McCall's 3442 into the "unfortunate fashion" pile:
McCall's 3442, 1972
To be fair, the actual pattern -- the pants and "shirt-jacket" -- are fine. But the (entirely fictional) fabric is a terrifying example of 1970s double-knit wonder.
Red Plaid Pants is actually the best-dressed one of the bunch. I think he and Green Boots -- green boots! -- are congratulating each other on Green Boots' fashion choices. (Really? A red lumberjack shirt-jacket with key lime boots?) Meanwhile poor Navy Plaid looks on...whether in disdain for his compatriots' fashion choices or sadness that they have not noticed his white webbing belt, I cannot say.