&gt; open(&quot;POST&quot;,&quot;<a href="https:&#x2F;&#x2F;www.adblockanalytics.com&#x2F;analyze&#x2F;&quot;" rel="nofollow">https:&#x2F;&#x2F;www.adblockanalytics.com&#x2F;analyze&#x2F;&quot;</a>)<p>That&#x27;s gong to cause confirmation bias.<p>Since you&#x27;re still relying on trusting an unknown client to run your code and submit your result instead of simply parsing the server logs, you have aren&#x27;t including anybody - with or without an ad blocker (either of which may include downloading ads.js straight to &#x2F;dev&#x2F;null) - who decides not to run that &lt;script&gt; tag.<p>&gt; www.adblockanalytics.com&#x2F;analyze&#x2F;<p>Time to add another &quot;IN A 0.0.0.0&quot; record to the local resolver.