You could easily use this to your advantage: 1. Your portfolio is now larger (my designs + people who ripped off my designs) 2. You could create a "Submit sites

You could easily use this to your advantage: 1. Your portfolio is now larger (my designs + people who ripped off my designs) 2. You could create a "Submit sites that ripped off our design" for your customers and create a conversation around it 3. Ask the sites to reference yours in their footer 4. Modify the ripped off source files to display modified header/footer on external sites You should be thanking them for creating so many opportunities for you. Why not expect everything will be stolen and go from there? It's all public files in the end.