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"Cowboy BeBop at His Computer" misuse?

Common Knowledge states Cowboy BeBop at His Computer is a sub-trope where "Documentations of a work get their facts about the work blatantly wrong, to the point that people familiar enough with the work will know that they didn't do their research properly." My impression was that it only applied to professional publications, is that the case?

From Cupcakes (Sergeant Sprinkles):

• Common Knowledge:
  • This story is very frequently cited as a creepypasta. It was never intended to be one. It's a fanfic, or a Dark Fic more specifically.
  • Everyone "knows" this fic started the trend of Pinkie having a violent, stoic alter ego that goes by "Pinkamena Diane Pie", inspired by a disturbing scene in "Party of One" where a flat-haired and schizoid Pinkie has a conversation with various inanimate objects. Not only was the fic released before "Party of One" premiered, but Pinkie is her usual curly-maned and cheerful self despite torturing ponies to death, and this supposed "Pinkamena" alter ego never appears at all. A lot of the unease of the fic comes from the fact that Pinkie, as her normal happy-go-lucky hyperactive self, is either unaware of or apathetic to the horrors she's committing; an evil and murderous alternate personality would defeat the whole point. The blog Ask Pinkamina Diane Pie probably didn't help.
• Cowboy BeBop at His Computer:
  • Many people believe that it's "Pinkamena Diane Pie" (flat-haired, depressive-to-psychotic Pinkie) who does all the slaughtering in Cupcakes, something that fan art frequently supports. Not only have they clearly never read the fic, but they don't know either that Cupcakes was released before the premiere of "Party of One", the first episode to have Pinkie turn back into Pinkamena. So when Cupcakes was published, let alone written, Pinkamena didn't even exist yet.
  • When "Party of One" premiered, many thought they saw disturbing parallels to Cupcakes. In fact, however, they only saw parallels to what they believed Cupcakes is about without daring to verify.
  • Pinkamena is complicated. Straight hair equaling Sanity Slippage comes from Party of One, Sanity Slippage equaling basement torture chamber comes from Cupcakes, "Pinkamena" as the name for straight-haired Pinkie comes from the fact that she always had straight hair back on the rock farm where she went by her whole name. Put it all together and what do you get?

I believe Cowboy is misused here as it's fans/fanon that gets these facts wrong as opposed to documentations of the work. Should it be cut as it's already under the more fitting Common?

Also, CowboyBebopAtHisComputer.The Mysterious Mr Enter is all examples that were cut from the disambiguation Critical Research Failure. Cleanup said to just cut them which I will per that, and due to misuse as it only applies/goes under the works that have the errors made about them, not the works making the errors. Any objections?

And if CBAHC is about professional documentations of the work, do web reviewers/personalities not count? Or can they if they have sufficient notoriety?

UPDATE: Asked Is this an example?