There's this youtube channel that reads SCP stories from the wiki. Pretty interesting stuff sometimes.
It's basically an organisation that deals with the supernatural or really any sort of danger to humanity that's caused by something other than people and nukes- be it aliens, an artifact, sapien cephalopod/crows, people with special abilities, internet user who goes onto forums like this and then befriends people so much that after a while he becomes mod etc, then he messages them and asks for personal info, and if they give it they die or get paralyzed irl. He then takes over their profile very well- personality and mannerism accounted, and sometimes he indirectly talks about his hijacked username's user's death
User: "Tungsten", real name Daniel ████████, age 16.
Cause of death: Fall from a balcony.
Context: Posted in a discussion thread about allergies, responding to a user who complained of severe sinus headaches.
"Ugh. My head starts killing me as soon as fall is over."
I can sympathize with that.
but it's unknown if he's causing the deaths, or if he finds people about to die, because every death can be explained by forensics and it's very down to earth. One victim's murderer had planned the murder 9 weeks before he joined the forum he met the SCP on.