If you blog, or you're just interested in dirtbags trying to control things,

Insty has some info for you. Linked article has this:
In July, Gibson told Threat Level that more Righthaven clients would be forthcoming. He also gave a brief accounting of how Righthaven works. Borrowing a page from patent trolls, Righthaven acquires the copyrights to newspaper content for the sole purpose of suing blogs and websites that re-post those articles without permission.

Righthaven usually demands $75,000, but will settle for a few thousand dollars.
So we know exactly what kind of extortionist we're looking at.