I believe that 555 thing came in when we actually got special prefixes over here, back when my first kids were little. I think the 555 prefix was the one we had to use for information calls close to home, but not in prescribed local area. The number we had to call was [area code]-555-1212. Since then, it has shown up in all the movies, for sure!
I just thought of another one!
Bad guys wear black hats/shirts/coats/whole outfits, whereas good guys wear white!
Girls that grew up with those types of movies (almost all Westerns, at least) surely were confused when the dreamy guy from down the street who was really a BAD BOY, loved to wear white! You know?