I mean "anticommunism" and "nitpicking" are perfect examples of mods abusing their power.
The only communities I have been banned on reddit were r/conservative and r/Pyongyang, and I have had plenty of disagreements over 7 years.
On lemmy I have been banned for defending AI, for pointing out historical pacts, the holodomor or gulags or for saying developers deserve to be paid, among others. In one year.
They did, in the 50s and 60s.