mememax - 2:17 pm on Dec 14, 2011 (gmt 0)

I remember a similar issue with a friend of mine which writes in an online newspaper. They used that method, put a canonical on each article they wrote. I don't know if this may be useful, because anyone can link to anything to establish the original one, however he told me that this technique worked fine for them, making google crawling their site faster and more frequently.