- Inordinately combative, mocking, sarcastic, or otherwise negatively emotional comments.
- Low value comments likely to provoke or distract.
- Comments complaining about downvotes (e.g. "I'll be downvoted for saying this, but...", or, "Why am I being downvoted? Is it because [I'm right | they're irrational | they have the wrong politics | etc]". There's even an example in this thread! This is essentially self-victimization, underdogging, etc. For the same reason, when I am downvoted, I never comment on it - I just accept that that's how people feel about what I said and try to learn from it rather than be bitter about it.