I have had only had this problem once, and in a way that most people don't think about. My site, which is in Swedish, was translated to German without me knowing it. For the reviews of pokerrooms all the text was straight translated (into good german too) and the screenshots etc was taken. This was also true for rules and strategies. They left the layout out though so that made it harder.

Fortunately they mailed a friend of mine about link exchange and he was the one that discovered it. I had a lawyer write a nice little letter to them and the whole site was closed quite promptly.