User blog comment:Semanticdrifter/The CC-BY-SA License and You/@comment-1427921-20120718081251/@comment-4811793-20120718173744

That is a great point! Often, just bringing the matter to the person's attention is enough to resolve the issue as their lack of attribution might just be unintentional. I didn't mean to imply that a DMCA notice is the only option, but it is an option.