Has your content been stolen? This can happen to any honest blogger who is always writing posts by himself. Someone might simply take advantage out of it and steal whatever posts he likes. There are at least a few different ways you can react in such situation:
1. Remain silent and do not do anything while telling yourself that you do not care about it. Sometimes if is not worth to do anything about it.
2. Contact the scraper by email and ask him to remove the stolen content from his blog. The problem is that he might not listen to you. Sometimes it might be even hard to find a way to contact him.
3. Use a WordPress plug-in (such as RSS footer from joostdevalk.nl/wordpress/rss-footer/) that will automatically link back to your site from the website of a scraper where he published your post. This plug-in might be very useful if you want to stay informed about any attempts of stealing your content. Of course, simply knowing about your content being published somewhere will not remove it.
Overall, there are not many things you can do if your content is being stolen by some unknown website. On the other hand, webmasters of popular websites may be afraid that you might spread the news of what they did.