I get your point. But when I used it, like @bozz, I add my own thoughts about the article. Of course it's not fun when the same article is posted several times. And of course, when someone just plain right dumps an article, with no added opinion or whatsoever, then is just sad. But don't put all these articles in one corner.
I agree that dLike needs to do something, but to this point, you can just post whatever the guy before you posted, and that is indeed wrong and creates spam.