The whole premise of FB is to "connect people", whether or not you like it, so it's not an entirely unexpected behaviour from them. It's also the reason I don't use FB, and never will.
I bet the patients of the Doctor found themselves through each having her phone number. Hey they both are "friends" with this person maybe they should be friends as well.
This doesn't require for the middle man to have an account. You are inadvertently acting as a conduit for people to connect to one another.
FB likely has a "ghost" account for you anyway that they use to do this connection. So it is like you are using FB in some alternate universe.
and the thing that sucks about us non-FB using people is that Facebook still has a pretty complete profile of our photo likenesses, names, emails, phone numbers, and other website profiles.
I bet the patients of the Doctor found themselves through each having her phone number. Hey they both are "friends" with this person maybe they should be friends as well.
This doesn't require for the middle man to have an account. You are inadvertently acting as a conduit for people to connect to one another.
FB likely has a "ghost" account for you anyway that they use to do this connection. So it is like you are using FB in some alternate universe.