Context can be found here: https://www.reddit.com/r/Stalking/comments/tcv0cw/a_decade_of_dealing_with_my_a_sociopath/

I deactivate Instagram pretty frequently/long-term now so I guess my stalker missed his usual annual/biannual follow attempts on there. My Facebook account can only be sent friend requests if we have mutual friends, which I suppose was enough of a deterrent while my Instagram was still accessible. This morning I wake up and see a friend request from "Soonysoon Soons" with no profile picture and 3 friends, two of whom are relatives of someone my stalker and I were friends with years ago, and one of these two I am Facebook friends with. 

Within an hour I see another relative of our mutual friend has added this account as a friend. I reach out to this relative to ask if he knows who Soonysoon is, thinking maybe it's one of his cousins making a silly joke account or something. He has no idea and didn't actually intend to add them so he promptly unfriended.

I'm about 99% sure this is my stalker (probably trying to freak me out with the suggestion that something will happen "soon"). The most disturbing part besides the level of effort (which has been a constant over the decade) is that our mutual friend doesn't even have a ton of family photos with these relatives so this guy really would have had to scour his or his sister's social media to find potential relatives who might also be friends with me on Facebook (the mutual himself is already aware of my stalker so he can't get through to me directly through that guy's socials).

I wish this guy would just fuck off. I've tried to follow the wonderful advice people shared on my original post, but it's sickening how fixated he is on me and how much diligence he's shown in trying to make sure I'm thinking about him.