I asked Facebook to delete all of my account information from their databases after hearing about this. I got a form letter and reiterated that I wanted my information deleted because I found their data-gathering practices despicable. Here is what the customer service person told me to do:

"If you want your information removed from our servers, we can do this for you. However, you need to first log in and delete all profile
content. Once you have cleared your account, let us know, and we'll take care of the rest. We apologize for any inconvenience this may
cause."

The email address for privacy issues is privacy@facebook.com.