[vijayr]

They're probably using the IP.

What is worse is that 1. There is no way to actually delete the data. From what I can see, they only disable the account if you ask them to delete. 2. Even if you didn't give any of your data to FB, your friends/family etc can - there is simply no way to prevent this (a friend takes a picture of you at a party, tags it with your name etc)