[sushantsharma]

Okay, I tried to look some more. I discovered that there is a "Facebook" option in the accounts list that I can add on my phone (Motorola Droid Bionic). This facebook account was responsible for the facebook contacts in my address book. So, I went to the facebook website and revoked its permission to access my account.

Its been more than a day now, and the facebook contacts are still there in my phone. May be you want to add the facebook account, and then revoke its permission from the facebook website. I think this will leave your facebook accounts in your phone.

I will update this post if my contacts disappear in near future.