Most of the content copied from my site to sites that actually rank is on Yahoo Answers.
Most of it is a fair use snippet with a (no-followed) link back. That is both legal and OK with me.
Some of it has just the URL (not a real link), and some of it has extensive copying (several paras or most of a page).
At what point is it worth complaining? Is there any short cut alternative to tracking down every single infringement?