Most people posting as tankies today aren’t tankies.
As someone who has done extensive reading in modern Marxism, Rawlsian doctrine, anarchism both historical and modern, and so on and so on (and yes that was a Žižek reference), many of those posting as far leftists are coming from wholly self-constructed positions. They’re either deliberately playing the role of an agent provocateur or they’re people who have unwittingly become broadcast nodes with the same effect.