first of all, I dont use facebook, I had the account active, but force myself to stay out of it .. Lately I had added a couple new contacts to my phone's agend

first of all, I dont use facebook, I had the account active, but force myself to stay out of it .. Lately I had added a couple new contacts to my phone's agenda, and now facebook shows me these in the "people you may know" emails it's clear to me that they had already started the data capture