It hurts to get your post copied by other by doing just ctrl + c and ctrl + v. I have learnt it the hard way. So here is a website that might help protect your posts or articles from being copied.
The copyscape is online service for detecting the online plagiarism. It uses the text medium to find the duplicates.
* Has free service but limited.
* $0.05 per search for premium
* Preety useful for free users, can be very useful for premium users.
* If you are not a member then you can search maximum 5 times from a computer in a month. No, removing cookies won't work.
* Only 10 results are shown for non members with so called top 10 tag.
* Shows results of even 2-3 words being the same.