What kills me on sites like reddit are the 'quippy one-liners' in response to arguments. You might write something rationally-crafted, careful to support your

What kills me on sites like reddit are the 'quippy one-liners' in response to arguments. You might write something rationally-crafted, careful to support your conclusion, and someone will respond with a funny-to-them sarcastic sentence, intended to totally obliterate the argument. People fancy themselves cocky and clever enough that reason isn't necessary. A few rofl's in response is all you need (or Likes on another popular service). That's really why HN is the only place I comment.