I don't know about most documentaries, but certainly a significant proportion of threads on MN are about dishonest reporting.
Some of them are really strange.
Eg there's one running at the moment where the OP says "how did I not know from the 2013 trials that girls were tortured?".
Gets lots of replies that the media were deliberately hiding it from us.
However on the first page, someone links three stories in major outlets from 2013 and 2014 covering the trials, most of which use the word "torture". By the end of the first three pages there are links to many more stories, with horrific detail, in major outlets from 2013 and onwards and to the documentary "Three Girls" (2017) and a R4 documentary (2020).
What's very odd is a lot posters are skating straight past those posts, like they're not there.
The posters that do admit the existence of the reporting say, "but nobody told me the girls were tortured. I just thought the girls thought they had older boyfriends who gave them gifts."
Despite the fact there are stories linked which explicit about torture and give examples.
So there's certainly something odd going on.