Text analysis of every single comment etc. Images are irrelevant if the rest reveals the context. Plus for meta data... The profiles that tech companies have of people, including assignment of devices with mac + IP.
Very easy, especially with AI, and what a coincidence that everyone is planning such huge data centers just for AI... will of course not be used for censorship or to create ethical groups later at the push of a button.... so that ethical cleaning can be tackled really efficiently. ( way more effizient as germany. )