Earlier quoted context omitted.
I deleted my FB account and the only thing that I went back for was my residents association. I still have no FB friends - which is fun because I can see the algorithm trying to work out who I know. Eerily, it correctly identified my partner and suggests I friend her (and her mother!) every time I login.
> Eerily, it correctly identified my partner and suggests I friend her (and her mother!) every time I login. That doesn’t seem that eerie to me. Your partner is most likely logging in from the same IP, and perhaps your mother-in-law has done the same at least once, or is friended to your partner. Making this association is pretty straightforward
This would seem reasonable, but in the UK we commonly have carrier grade NAT, which is to say I share an IP with really rather a lot of people. It'd be interesting to see if that was the case. Maybe I'll send a subject access request.