Zivush - 5:48 pm on Nov 14, 2012 (gmt 0) [edited by: Robert_Charlton at 9:31 pm (utc) on Nov 15, 2012]
Agreed. It depends on who scrapped your content and how your site is ranked compared to the scrapper.
If, for example, WSJ takes things from your site and publish them, it will surely outrank your site.
I once had some issues with Linkedin and eHow, but both are no longer seen as a competition.
I have posted a <thread about a slightly different but related question involving dupe content that might also be of interest, about whether to change pages that have been scraped a lot but are still ranking>...
Would You Improve Well Ranked Pages in Google?
Above all, many of these pages were copied/scrapped thousands of times all around the web. Making some modification could confuse Google algo so it misses the originality.
[edit reason] removed off-topic comments [/edit]
[edited by: Robert_Charlton at 9:31 pm (utc) on Nov 15, 2012]