One of the problems with RSS and Pingbacks in SEO right now is the presence of scrapers or lazy black hat webmasters over the internet that steal your own blog content using some commands that redirect content from your well made blog to theirs. This is actually copyright infringement, so webmasters should know how to defend their own blogs.
While there is no current means of necessarily preventing these hackers, there is a way to drive them away, or at least make them pay for their evil deeds (but in order for this to happen you have to be able to catch them doing this first, which is another topic).
The most popular method used by webmasters today is cloaking – a practice originally thought of as a black hat technique in SEO until it recently became useful against blog thieves. By sending content other than what is actually seen in your original blog, you can make hackers receive trash content from you to mess up their dishonest websites.
The method was originally thought of by a webmaster called RSnake, and he shared the codes here so that it could be used by other webmasters as a means of protecting themselves as well.
Article written by SEOnotepad.com