If you click on "5 minutes ago" there is a flag link/button.

That comment isn't really worth flagging though, it's already been downvoted a couple of times which will sort it to the bottom of the page, and it isn't egregious, just odd. If it was part of a pattern, then it would be worth flagging.

It takes 500 karma to be able to downvote comments.

Oddly, I'm mostly a lurker and relatively new to HN...I didn't even know there was a down vote option. So, there's that.

ok why do that? think of it as a means to learn and then proceed from there, down voting is just a means to lower an opinion because you don't agree, fine don't agree, but your opinion is no better they are all like asses, we all have them.

not spam just my humble and informed opinion