Designs Hijacked from Blogger

Many websites like Keywordpictures.com, Paolajacopomedia, Weddingconcept Ideas, Thrissur info is info.co.in, Imgkid.com, Imgarcade.com, Pixsharkpotyxuxcajagos etc. have hijacked my deisgns and are now appearing in their websites. I had no watermarks on the designs earlier and that could make the job easy for them. Shame on these people who take the credit on someone Else's sweat.