Slingring 
Dumb Equine
The owner of Fimfetch, which is a archive website for PonePaste was known for censoring specific stories for containing content that he disliked or found to contain “foalcon”. Although he often was lazy with taking down these stories, he spent most of his efforts making a lengthy list of users and usernames from Derpibooru, Ponebooru, Discord, Ponepaste, and other websites over the span of multiple years. Out of the users on the list, it includes artists who “by his own judgement” were found to have “made foalcon content”, users who “participated in foalcon servers” despite having never posted foalcon or having only said satire relating to foalcon, and completely unrelated users who the owner disliked for “saying naughty things”.
Obviously such list only gained traction when large pony discords starting basing their “blacklist” off of it, and banning otherwise innocent users from entering their server, saying reasons like “we don’t want to associate with you”, “your on the Fimfetch foalcon list”, “your on the MCL list” and etc.
Thankfully the private server that hosts this list got leaked, and the collaborators inside of it (multiple admins/moderators from different pony related discords) were found to have conspired towards “filtering through private reports” and “further expanding this blacklist”. Even though the list was intended for “foalcon” there are multiple users who got banned in one server for a offence not related to blatant paedophilia or grooming, and ended up on the list, including people and artists who had “foalcon” related content in their derpibooru favourites when the owner (revealed to be DataByte, who’s discord handle is “databytebrony”) was “independently examining” each report.
In DataByte’s server, the collaborators were outed to be as follows with their respective servers.
databytebrony - BronyTales
frostflare - Ponyville Plaza
latent_logic - Everfree Northwest
emperor_sombra - Ponies React!/Confetti’s Bat Cave
astrolazuli - Ponyville Plaza
stormshadow_cote - Ponies React!
daringshepard - BronyTales
gabrizzy - RandomPlace
phoenixfire42 - Equestria Daily
comradesparkle - Equestria Daily
As for evidence backing up these claims, you can gladly find the chat logs of DataByte’s “secret police” server at
https://files.catbox.moe/i7icq0.txt
https://files.catbox.moe/i7icq0.txt
As for the publicly available bits of the list, it’s at https://fimfetch.net/foalcon-advisory
