I wouldn't consider this grounds for a ban or anything, though I do think the member ought to be schooled as to how to properly cite his source.  The way he did it isn't just lazy, it's the absolute wrong way to cite a website from which you're quoting something.  The right way to do it is to provide a link to the exact page the quote comes from.  This should be obvious, but who knows what level of education this knucklehead has, not to mention where his moral compass points.

That's my opinion, but I could see how others might think this is at least borderline plagiarism.  I just don't think it goes that far, because he did make it somewhat clear that he isn't the original author of the post.