"The internet" didn't exist in a modern-recognizable form yet. My unsuspecting 7th-grade English teacher had us do a creative writing exercise and then trade with a random classmate for critique. I should mention that he hadn't told us about that part ahead of time, and also that it should be obvious from just that that he was not equipped to handle what was about to happen.
I wrote a fanfic of Andre Norton's Beastmaster series, because my parents let me watch the baffling 1982 movie adaptation at way too young an age and I lost my tiny tweenager mind when I discovered that a) they were also books and b) the local library system had them. The novels followed the adventures of a demobbed special forces soldier named Hosteen Storm on a human-colonized alien planet.
The boy I traded with had written a fanfic of The X-Men, haphazardly available on the magazine rack at the local grocery stores and as a Saturday morning cartoon. Unsurprisingly, it prominently featured the mutant Ororo Munroe, aka Storm.
I was vaguely aware of the X-Men as a thing. My surprise critique partner was not even slightly aware of the 1959 science fiction novel or its 1962 sequel.
We gave each other the most useless writing feedback in the history of useless writing feedback.
I can't remember exactly what I wrote for him, but I'm sure 99% of my points would have been answered by having watched more than one and a half episodes of the show, because his story otherwise seemed very straightforward--superheroes did superhero things with their superhero powers, and Sentinels, which I vaguely recalled being the evil mutant-hating robots that were just allowed to fucking run around unattended, tried to kill them. It probably would have been a banger if I hadn't been so in the dark on the source material that I somehow arrived at the conclusion that Danger Room was a heretofore unguessed-at and cartoonishly overpowered X-Man that the whole team ganged up on for obscure superhero reasons.
What he wrote for me was short, sweet, and to the point: He corrected all my hes for Storm to shes and then informed me that Storm did not talk to animals, she controlled the weather, and that she lived at the X-Mansion, not in the desert, and that there were no aliens in the X-Men*.
When we read each other's feedback, we accepted it with all the grace of 7th graders being given an unexpected critique on a mandatory assignment from a classmate we didn't know well or particularly like who was also possibly the biggest dumbass on the face of the planet for not knowing that Storm was a weather-controlling girl/not realizing that this story was about a completely different goddamn character.
Him: The X-Men are a superhero team appearing in American comic books published by Marvel Comics. Created by artist/co-plotter Jack Kirby and writer/editor Stan Lee, the team first appearing in The X-Men #1 (September 1963).[1] Although initially cancelled in 1970 due to low sales, following its 1975 revival and subsequent direction under writer Chris Claremont--
The teacher: By Talos, this can't be happening!
There were blood-feuds being born in other corners of the room as feral children ripped into each other over beloved original work, but that I think he at least understood. There wasn't a serious teacher shortage at the time, so I assume the guy teaching our English class had sat through at least one undergraduate creative writing class with critique sessions. People being mean, missing the point entirely, or taking fair critique way too personally were things he'd presumably witnessed at some point.
I don't think he'd ever seen two people get into a passionate and mutually-incomprehensible argument about genetically-altered lifeforms, psionic bonds, and weather-control powers. He definitely had no idea how to moderate that argument, and I suspect all he heard was us making nerd-child noises at each other at a steadily rising pitch and volume, like tree-frogs competing for territory after a hard rain.
Anyway, nobody in the room knew what "fanfic" was, but that didn't stop us from inflicting it on each other in person, for a grade.
*I like to think his love of the series was long-lasting and deep enough for him to feel a pang of remorse at how wrong he'd been on this point when he hit the storyline where not only were there aliens in the X-Men, but Professor X fucked one of them.