I just think it's a perfect way to recognize those people who have literally a) no sense of humour and b) no backbone to refuse to steal jokes from others.
I mean: what kind of miserable snip must one be to read this "I used to post completely unrelated Skyrim comments, but then I took an arrow to the knee" under any youtube video, simply steal it, start posting it around yourself, and how incredibly miserable must one be to like those comments to make them top comments of some videos?
I really don't understand it. Everyone who posts such comments and really thinks it would be funny (or who wants to annoy people on purpose, which also is a sign of a miserable character) must be a complete humour-cripple, and I know in real life I would NEVER get along with such a person, as we are literally the complete opposite in everything, and I can judge this VERY WELL only by this little "joke".
If some of the "knee-trolls" think now, this is a rage post and they accomplished their mission: you are wrong. Don't read it with an enraged voice, rather sighing and pitiful, as it's just sad to see people taking advantage of the security the anonymity and the distance of the internet provides, being able to annoy people without fear of physical consequences, something they would NEVER be able to do in real life, simply because they are miserable snips. I can't imagine some "alpha leader"-types (or at least some self-confident, well-adjusted person) in real life trolling in the internet.
Poor you.