Early last month, YouTuber Chen Yen-chang (???) posted a message on the Taiwan New Constitution Foundation’s Facebook page, saying: “Dear all, I support Taiwanese independence. Taiwan already is an independent country. I am a Taiwanese. I am not Chinese.” He later said that his Facebook access had been restricted for 30 days. The revelation prompted numerous complaints from commenters describing how they had been blocked or had their accounts deleted with no reason provided. I wrote an article asking whether Chen — who runs the Mr 486 (486??) online shopping YouTube channel — was sanctioned because of a Facebook error,...