I'd usually agree, except when it comes to saying anything critical of China on the Internet, my statement is very true. The wumao is a real thing, and they're pervasive within online tech.
Wumaos are low-paid grunts and sincere idiots who disingenuously downvote, report and post irrelevant nonsense regarding racist imperialist AmeriKKKa or legitimate Chinese clay/territorial waters/6000 years of peaceful history. This is very easy to see. You're free to suspect any interlocutor as being one, of course, but if that's your only retort, you'd do better not stooping to the level of an undeniable propagandist and instead conceding the object-level issue – or keeping silent.