Originality is always a winner – and though imitation may be seen as flattery, on the web, copying content from other websites is not only bad practice, in most cases it’s illegal.
Duplicated content can also count as low-value content to Search Engines, so if a site is copying you, they may be damaging your Search Engine score.
A free service by Copyscape provides online copyright protection by allowing users to “easily search for plagiarism and identify instances of content theft”. Lingo HQ use this tool for our customers and ourselves to check for instances of duplicate content elsewhere on the web, and defend against threats of online plagiarism,
You can check for copryright infringement of your page online here: http://www.copyscape.com/online-copyright-protection/