> @thedarkwanderer comments suggesting actionable improvement are generally ok - comments are for doing that, or requesting clarification. Comments explaining someone needn't try (e.g. "-1 I disagree completely" I guess?) get deleted, since there's no actionable improvement there.
Also, I don't think 'misunderstood' means what you think it means there, but if someone is communicating badly and I'm having trouble understanding it, I could leave a comment saying I'm having trouble suggesting where they can be clearer - that's a request for clarification and actionable improvement.