Yesterday I finally received two registration certificates from the US Copyright Office for one of my sites. One from mid 2009(!) and one from May this year for a rewrite (guess they're either catching up, or work on an entire account while they're there).
If I list these in the footer of my site will they either deter some scrapers and/or help in getting copies taken down?
I'm wondering whether to take the noarchive out of these pages. Maybe even allow more than just the big three to crawl the site.