I can understand why you'd be cynical. Perhaps the "up vote" function is over-the-top. In my mind, though, it isn't that different from the Tweet and Like buttons at the bottom. I just want to spread the word. (The more people that read it, the better the discussion.)
As for the "0% content" part, I'd ask you to read a couple of other posts before outright dismissing it. Perhaps from there you'll get a feel for whether it's link-bait or something I believe to be important--and worthy of broader attention.
"it isn't that different from the Tweet and Like buttons at the bottom"
Yea it is, it isn't a small button at the bottom. Also twitter and facebook are already full of noise but HN isn't, it feels like you want to promote noise in HN. Despite if this is what you want, that is what it feels like.
Every time somebody does this "vote me on HN" stuff, I wont if the content isn't really good and very, very clearly belongs to HN. It raises the bar even higher.
As for the "0% content" part, I'd ask you to read a couple of other posts before outright dismissing it. Perhaps from there you'll get a feel for whether it's link-bait or something I believe to be important--and worthy of broader attention.