Says George Ferguson "FYI -- YOUR PHONE NUMBER IS NOW ON FACEBOOK! "

and GF suggests this solution

"Go to the top right of your screen, click Account then edit friends. Go to the left side of your screen and click phonebook. Everyone's phone#'s are being published. Please repost to let your friends know this is happening so they can remove their phone if they want to.
"To change it, go to privacy settings;
customize settings;
Go to the item you want to change and click on the drop down;
choose customize;
choose only me;"

Read the above while cruising FB. Check it out!