Satan-worshipping paedophiles are trying to take over the world. They have been running a child-trafficking ring for years, their members hiding in plain sight, and some of the biggest celebrities in the West have long been active recruiters. They will destroy our way of life if we allow them to, so we should be on guard. There is only one man standing between this powerful group of evildoers and the rest of us. His name is Donald Trump.

This premise doesn't sound convincing even if it were to appear on the back of a cheap paperback. And yet, the number of people in the West who bought into it in the months before the US elections now runs into millions. There are still closed Facebook groups where these people discuss this cabal, thousands of Twitter and Instagram accounts pushing more proof of the theory every hour, and at least two American congressional candidates, to date, who have expressed belief in its validity.
The theory is called QAnon, if you're interested, named after an individual called Q. Some believe the individual has long morphed into a group, but that is beside the point. What matters is the speed with which what was once a mere blog post slowly evolved into an online monster that continues to attract new believers, most of whom say they intend to do something about it.