More from the cited article...

... In 2008, a software developer in San Francisco named Curtis Yarvin, writing under a pseudonym, proposed a horrific solution for people he deemed "not productive": "convert them into biodiesel, which can help power the Muni buses."

Yarvin, a self-described reactionary and extremist who was 35 years old at the time, clarified that he was "just kidding." But then he continued, "The trouble with the biodiesel solution is that no one would want to live in a city whose public transportation was fueled, even just partly, by the distilled remains of its late underclass. However, it helps us describe the problem we are trying to solve. Our goal, in short, is a humane alternative to genocide." ...