Here is the story at ExtremeTech.com. This is entirely believable. And it highlights a problem within Christianity (and Catholicism), that many persons just want to hear opinions that echo their own ideas and understanding. They do not want to be taught, corrected, or shown deeper insights into the Faith. And this error is what makes them susceptible to fake Christian pages by Troll Farms.
A Troll Farm is a for-profit company, usually overseas, often in Russia or former USSR republics. The Farm cultivates pages on a wide range of topics to gain a large audience. Then it hires itself out to spread misinformation for clients, even political misinformation to influence elections.
What is Congress doing about this? nothing.
What are govt agencies doing about this? nothing we know of.
How dangerous are the Troll Farms to democracy? As dangerous as the internet is influential.