While I really agree with what you're saying though I think you're falling into the same trap a bit.

If you can be civil I think you'd have convinced others to agree with you. If you can't: Downvote, flag, and we move on.

For the record, once you reply you prevent him from deleting his comment.

This comment is boldly presumptuous. I could argue that you love the feeling of superiority and righteous indignation so much that you completely disregard general etiquette when speaking with other people. Your disrespect and lack of empathy make the world a far worse place. If you were a decent person, you would apologize for not taking your medication this morning.

Please don't reply to an egregious comment by breaking the site guidelines yourself. That only makes this place worse.

https://news.ycombinator.com/newsguidelines.html