If you're my Facebook friend I (may) now have your phone number

Log in to FB.
Go to the top right of the screen, click Account, then click Edit Friends.
Go to the left of the screen and click Phonebook.

Fascinating. I suspect many of those are phone numbers people put in themselves, but some are supposedly numbers that were grabbed by various Facebook apps on smart phones, probably without their users' actual knowledge. Which app I will now be deleting from my Droid. Sigh.

It's not clear to me whether any of those are numbers that an FB app grabbed from my (or someone else's) phone contact list. So even if I don't run an FB app on my smartphone it's possible you've added my phone numbers to FB by running the app on your smart phone with me as a listed contact. That's annoying, but I see no way to deal with it.

My numbers are all listed in phone books and findable by online searches; I have no idea if this process respects any sort of "unlisted number" you might have with your phone provider.

If you're my Facebook friend I (may) now have your phone number

Log in to FB.
Go to the top right of the screen, click Account, then click Edit Friends.
Go to the left of the screen and click Phonebook.

Fascinating. I suspect many of those are phone numbers people put in themselves, but some are supposedly numbers that were grabbed by various Facebook apps on smart phones, probably without their users' actual knowledge. Which app I will now be deleting from my Droid. Sigh.

It's not clear to me whether any of those are numbers that an FB app grabbed from my (or someone else's) phone contact list. So even if I don't run an FB app on my smartphone it's possible you've added my phone numbers to FB by running the app on your smart phone with me as a listed contact. That's annoying, but I see no way to deal with it.

My numbers are all listed in phone books and findable by online searches; I have no idea if this process respects any sort of "unlisted number" you might have with your phone provider.