I think that would be the best way, post a commentary (doesn't have to be long) about the link itself and the individuals personal thoughts of the article.

I'm kinda in the same place I won't down vote copy paste content but I also won't up vote it, which kinda sucks when it's a decent article. So if someone merely linked it with their own little write up, that I would up vote for. If it was A) a good find and B) a tiny bit of effort was put into the commentary and it doesn't look like a 2 year old wrote it.