This is a terrible study. For one thing it lists Facebook, Instagram and Twitter but its own data says that while 73% of the bullshit on Facebook comes from their annointed 12, only 17% of it comes from them on Twitter and they didn't even publish results from Instagram. They have no numerical breakdowns on any of this. However, they give you little factoids like "The largest anti-vaccine Facebook Group now has 236,000 members" but make no mention of the fact that the biggest anti-vax jackass out there, Larry Cook, had 195,000 members in his Facebook group until he was deplatformed in November. This stuff is a problem? And social media's feet should be held to the fire? But this is every bit as unserious as a Mashable article can be. Numbers and metrics and results matter in stuff like this, not "we wrote this report to single out 20 people but we decided 12 was a catchier number."