Are these people's accounts being banned, due to Youtube posts? Spamming? Account sharing? Piracy? Something else? Does anyone have a verifiable example of bei

Are these people's accounts being banned, due to Youtube posts? Spamming? Account sharing? Piracy? Something else? Does anyone have a verifiable example of being banned, unlike this anonymous one? I've seen many stories but wonder if these are more of thought experiments than examples of real world occurrences.