It looks like that blog is run by teens who think they are internet heroes. A reply from jewishmagpie's blog shows how immature they really are:
So anybody can send them an ask about something that triggers them, even if they are just trolling. And these SJW superhero kids will cause them real life trouble and hurt their reputation, getting them online abuse from other idiots who think everything they say is true. Problematic fanfiction? I wonder if it's just underage characters in romances with adults or if it's also that "you can't ship that character with that other character who said a mean thing once! That's their abuser!" Or stuff like writing yaoi but being a straight girl who isn't transtrending. Fanfiction is totally fucked these days because of that. Heaven help you if you don't follow the big book of shipping, gender identity and pronoun rules. This is why everyone writes such utter vomit these days and there are few fun random fics around anymore.
But the problematic fanfiction part is what really got me. Like someone's fanfiction that you don't like is a crime worthy of sending your personal army after. That blog is a joke and should be shut down. If just to get them for the cyber bullying they claim to crusade against. It seems to be pretty common on Tumblr for an ask to be taken as gospel, even on anon. You'll get dogpiled by someone's personal army.
There's so much
Anon: That person is a (insert problematic thing here)
Blog owner: OMG! Thank you for telling me! I'll tell all of my followers to unfollow them and put them on my blacklist and BYF page right away!
Tumble is exceptional beyond belief.