It doesn't weaken his position at all. Just because it hurts your delicate sensibilities.

Appending "Thanks, dicks" weakens the comment because it demonstrates they have nothing to say other than vulgarity, which means they have nothing substantive to say at all. We never object to profanity by itself on HN. We do object to abusive swipes and name-calling, because it pulls discussion away from HN's primary purpose, which is curious conversation, and drags it towards the gutter.

While I have you: could you please have a re-read of the guidelines and have a think about if you really intend to participate here earnestly? We've asked you several times to lift your game, and we're not seeing any effort to reform. This place only continues to exist because we have guidelines and uphold them daily, and enough other people make the effort to contribute positively. https://news.ycombinator.com/newsguidelines.html