4 ms·

What confuses me is that I've had the correct contacts show up in Facebook for an email address no one else should know about.

• jtbigwoo 14y ago
  It's probably just name, location, and interest matching. Especially if you have a fairly uncommon name.
  • saraid216 14y ago
    It's using a different name; I don't think I have a location set; and the only similar interest would be League of Legends, since I created the account initially just to get the free promo. The only thing I can think of is that it's matching IP addresses and concluding my two accounts are the same account.
    • sp332 14y ago
      Even when you log out of Facebook, it keeps some cookies around.It could be more than just IP address.
      • saraid216 14y ago
        Different browser, too. :P On the other hand, I'm not sure how well separated I kept those, so it could have been cookies linking the accounts. (I did this way back in 2010, so my memory is fuzzy.)
    • jtbigwoo 14y ago
      Now that's fascinating. Matching an IP address is a different thing than using information that a user has shared explicitly.