Domains are being seized by the U.S. Department of Justice and Department of Homeland Security under the auspices of ICE. Homeland Security with help from ICANN has seized the domain of a torrent search site and posted a notice stating: "This domain name has been seized by ICE Homeland Security Investigations, pursuant to a seizure warrant issued by a United States District Court under the authority of 18 U.S.C. 981 and 2323."
ICE has been taking down sites under 18 USC throughout this year, but previously it has been those that've hosted torrents or been found selling knockoff merchandise - policing the web like officers who close down street vendors of bootleg DVDs and counterfeit handbags and watches.
The action against Torrent-Finder that only acts as a search engine of torrents - legal and otherwise - and isn't hosting any torrents. The second really scary part is that -- ICANN totally bypassed GoDaddy and assisted the U.S. Government in the seizure of the site.
A court order issued in New York that took down similar sites stated it "authorized the seizure of seven websites, all of which are involved in the illegal distribution of copyrighted movies and television programs over the Internet."