&gt; <i>Yeah ok but how many end-users are conscious enough of the situation to OPT-OUT of such an intrusive policy?</i><p>Well, I meant opt-out as in &quot;not use&quot;.  Plenty of people don&#x27;t use Facebook because of the privacy implications.  And as another use mentioned, this is the reason that people are so upset about Facebook&#x27;s shadow profiles, because it removed your ability to opt out of their tracking.