https://www.google.com/amp/s/amp.theguardian.com/society/2018/aug/23/russian-trolls-spread-vaccine-misinformation-on-twitter
https://www.theguardian.com/technology/2018/aug/21/facebook-pages-accounts-removed-russia-iran
or
To join, you must be at least 13 years old and agree to the terms and conditions