Ironically, the whole advertising system is set up to identify the viewer to the advertiser, not the other way round.<p>I built my own &quot;opt in&quot; by watching the status bar for slow loading sites and using the DOM inspector on visually annoying ads, then adding the host to my hosts file. It&#x27;s very short: basically just google, doubleclick, outbrain, taboola.<p><a href="http:&#x2F;&#x2F;pastebin.com&#x2F;YAbJHe5j" rel="nofollow">http:&#x2F;&#x2F;pastebin.com&#x2F;YAbJHe5j</a>