https://arstechnica.com/tech-policy/2019/08/fbi-says-extremists-motivated-by-pizzagate-qanon-are-threats/

The modern era of the Internet has given us a seemingly never-ending bounty of farfetched conspiracy theories. Some of the loudest of those fringe movements have become pervasive enough and serious enough to qualify as domestic terror threats, the FBI says.

Yahoo News today published an internal FBI document it obtained warning of "conspiracy-theory-driven domestic extremists."