Comment It's a facebook account/details farming scam (Score 5, Insightful) 340
Gathering torrent IP's from popular sites isn't difficult.
But they clearly want people very badly to sign in with their facebook accounts. First they're scaring people to sign in by promising removal from their database. If you visit the site again they provide you with a choice - an impossible (!) captcha or facebook. It's social hacking.
First off - don't let them scare you. Copyright holders has all the info anyway. Second, don't ever give away your facebook credentials to a third party that you don't trust. Third, don't trust these people.