Everybody knew what a old perv the Promotional Manager was, but he was so sweet and never hit on any of the celebs that he worked with so everybody just considered him harmless. He certainly seemed to have a silver tongue as far as the young actresses looking to make a break for themselves were concerned.
This, in turn, resulted in a pop cultural Broken Base or Fandom Rivalry.
Hip-Hop is a good example of this (see Hip-Hop's Broken Base entry).
This isolation of pop culture can lead to such ignorance as Cowboy Be Bop at His Computer.
It's even possible for this trope to happen within the same culture.
Can also result in people outside the subculture experiencing Informed Real Life Fame.
For some people with a certain ideology, however, Pop Cultural Isolation may be seen as a thing.This trope possibly could lead to Monochrome Casting.Expecting Pop-Culture Isolation not to be an issue is a sure way to incur Pop-Cultural Osmosis Failure.Contrast Small Reference Pools, and Pop-Cultural Osmosis. May lead to Germans Love David Hasselhoff or Americans Hate Tingle. This trope along with Public Medium Ignorance goes together like peanut butter & jelly. Compare with Fan Myopia, which is when the fans of a particular form of pop culture believe it to be far more well-known amongst the general public than it actually is. Her black, tear-away pants were loose fitting down her legs but stretched tight around her thick ass as she popped her tush out towards the audience and she grinned as the audiences’ hoots and catcalls got louder.