jwz just confirmed on Twitter that he blocks requests with HN in the referrer: <a href="https:&#x2F;&#x2F;twitter.com&#x2F;jwz&#x2F;status&#x2F;665658171415859200" rel="nofollow">https:&#x2F;&#x2F;twitter.com&#x2F;jwz&#x2F;status&#x2F;665658171415859200</a>