Torrentfreak reports of HBO tracking torrent swarms of its popular show, Game of Thrones. The show's seventh season started this past Sunday. Through its anti-piracy partner IP Echelon, the company has sent warning messages to ISPs of would-be pirates. The message states the alleged users IP address and warning of the unauthorized sharing including a notice of possibly subscribing to service through their television package. The company is not well known for going after suspected torrent users; only wonderful artwork by kids, but be warned. The warnings in question include the IP-addresses of alleged BitTorrent users and ask the associated ISPs to alert their subscribers, in order to prevent further infringements. Under US copyright law, ISPs are not obligated to forward these emails, which are sent as a DMCA notification. However, many do as a courtesy to the affected rightsholders.