If every HN submission were spammed with "communist bandits," do you think at some point the mods would just write a script to block such comments? It doesn't seem absurd to me to think that they might. It wouldn't bother me in the least if they did. That type of comment is even less edifying than "first" or "top" or "did anyone else come here from 9gag."

I work for Google. It does some things I don't like but this does not prima facie appear to be one of them.