Is this a blog scraper site?

[Agent]

I have comments turned off in the blog software (WP) but I got a comment today, which is strange, so I assume its a pingback of some sort, from this site:

http://free-porn-world.info/wives-carolyn-reese-and-richelle-ryan-are-wife-switched

And it contains text from my post here:

http://www.thesexyhousewife.com/blog/2008/02/22/wives-carolyn-reese-and-richelle-ryan-are-wife-switched/

But it doesn't look like it took it from my RSS. It has more of the post than my RSS spits out. Any ideas what this is? What I should do about it? It looks like a scraper site to me. It looks as if it pulls from a lot of other sites too.

It does link back to my original post but I don't understand what it's trying to accomplish if its not just another scraper. Do you guys have this happen often?