I mean, just to push one onto the stack...

> When disagreeing, please reply to the argument instead of calling names. "That is idiotic; 1 + 1 is 2, not 3" can be shortened to "1 + 1 is 2, not 3."

> Please don't post comments saying that HN is turning into Reddit. It's a semi-noob illusion, as old as the hills.

> Don't feed egregious comments by replying; flag them instead. If you flag, please don't also comment that you did.

FYI, barking orders at people and swearing at them because you're personally offended by something said in humor, is much more stupid, and is arguably more unwelcome here than GP's comment.