Re: I thought Facebook was pulling friend suggestions out of my email contacts
If you go to "find friends" on Facebook, it openly asks you if you want to mine your contact list from a wide range of e-mail and other communications software.
If someone you know says "yes," there you are on the system.
Needless to say, I advise my family and others not to do this.
I have a grand total of 15 people on my friends list. I have turned down even some people I like (usually relatives) to keep that list short, particularly people already on my wife's list. I hope they understand it's not personal.
Some people seem to think they gain Buddhist merit or something by having an immensely large friends list. Go figure.