As a blogger, should I focus on content creation or spend enormous time on finding content scrapers and then for filing DMCA Takedown notices? Please advice…

I’m very much annoyed that you continue giving higher ranking to content scrapers even after your so-called algorithmic updates Panda, Penguin, Caffeine, etc. I completely understand when a higher authority website outranks ours even for an exact match "title search".
But there’s no excuse when a spammy content scraper website continues to outrank the original blog posts. Recently you published a Webmaster video where Matt Cutts explains how Google finds it difficult to find the real author of an article.