Recently I got an e-mail from a company to remove content from my website because I have copied their content. Let me break it down, I did not copy their content, only certain sentences I did copy slightly but edited them. Furthermore their whole website is more or less copied from other websites. The reason they are pissed because the latest google update crushed their site and our site more or less replaced their rankings. What should I do? In all honesty I am not worried but I do not want anything to haunt me later on.