I've noticed that it's become more acceptable to add noise and meaningless comments to HN threads. I came across this thread yesterday: http://i.imgur.com/ZZt3F0M.png. The parent comment about the wingsuit flyby was somewhat relevant to the original topic. The subsequent replies were silly noise.
Please refrain from writing comments that don't add anything meaningful to the discussion. Hacker News is not a place to post chains of memes. If you want to do that, go to reddit where it's an accepted and important part of the culture. Please do your part to keep the signal to noise ratio here high. Thank you.