You may have noted that there is a related thread
Google is destroying website rankings
about the same subject. So I assume that it is different from that discussion.
Even if there is no duplicate content penalty, there is a problem for the original poster if his site is filtered out of the results.
That may be the reason why
A New Search Engine Approach based on copyright is the ideal solution. Whether it is practical is another question.
Related WPW thread:
Semantic engines - nothing difficult, at all...
What has happened to some of my own sites?
site:
DigitalStart.net: The starting point for English speaking surfers and webmasters
The site is still in the index, but AdSense do not function any longer.
The same with the site in the last link in my signature.
May be some of the
SEO experts here can explain why.