Scraping sites – original source tag?

http://aplawrence.com/Web/web_scrapers.html

Digg it here:

http://digg.com/linux_unix/Scraping_sites_original_source_tag

And, my comments:

Tony has a great idea proposed here. A tag that identifies where the content originates from, so that the author is given the correct credit. Something like a books’ ISBN code could be generated, so the content would be forever “cataloged”.