&quot;Research has shown that users are already desensitized to privacy and security warnings.&quot;<p>This along with the quote below are my biggest takeaways from this article:<p>&quot;it can be difficult to avoid information leakage through URLs or cookies or more sophisticated attacks.&quot;<p>People may not even realize they are giving the keys away until it&#x27;s too late. It&#x27;s unlikely that a dialog box for confirmation would be explicit anyway, especially if Ancestry and others stand to monetarily gain from your DNA.<p>Moreover, if you&#x27;re a malicious actor you can simply display an ad from Ancestry and when you have a logged in user you could potentially identify a whole host of other information that can be associated with their email and other aspects of their identity. The malicious actor could resell this to even worse offenders.