Well-known anti-vaccine activist permanently banned from Facebook: Larry Cook, the creator of one of the largest ant-vaccine groups on social media, was permanently banned from Facebook. "Facebook just terminated my account. Cannot be reversed they say," Cook wrote in a post on Twitter alternative Parler. Cook's Facebook group, "Stop Mandatory Vaccination | Vaccine Free Parenting," with over 200,000 followers, was also deleted from Facebook shortly after Cook himself.