After doing the same as you’ve described above (and being sure to screencap fucking everything because we know they’ll scrub themselves again and migrate soon) I’m in full agreement with you. I’m going to take everything I have and do a podcast episode about it, breaking everything I have found out down. This is definitely not an ARG or an edgy art group. They name drop groups that have grimoires with a heavy focus on necromancy, as well. And these creepy videos they have up also? They’re definitely deeply encoded, and all it will take is some time and effort to decrypt the hidden messages behind the videos. One user also alludes to the fact that this group has multiple forums/websites they use/have used to communicate with one another and share content between each other in a secure fashion. I’d almost go so far as to recommend someone infiltrate them (it’s clear they want new “initiates”) to figure out exactly what’s happening so maybe authorities would get involved, but I’m afraid getting too close to these people will simply implicate whoever is trying to infiltrate in some sort of crime.