On Reddit, for example, if your aggregate comment karma in a subreddit is below 0, then you are rate limited to only commenting in that subreddit once every 10

On Reddit, for example, if your aggregate comment karma in a subreddit is below 0, then you are rate limited to only commenting in that subreddit once every 10 minutes (maybe this is opt-in by the mods of the subreddit, idk). Make a few right-leaning comments in r/politics and you'll quickly realize how much of a weakness this is for any attempt to participate equally in subsequent discussions. Incidentally, one of my favorite HN features is that the minimum comment score is -4. If your entire account has negative karma soon after creation, it will be shadowbanned, but at least once you attain a sufficient karma buffer, one poorly received comment can't hurt you too much.