And they are force multipliers for each other. The exchange does show that people who are bad judges of info on a topic are often also bad judges of people — no less when they want to judge someone who doesn’t care to know them back beyond the content already in the public domain.

See: sovcits or "targeted individuals." As lone cranks they couldn't get up to much, but when they can encourage each other or reject a family intervention with "look there are tens of thousands of us in my FB group!" it's tougher.