http://danielas3rtn54uwmofdo3x2bsdifr47huasnmbgqzfrec5ubupvtpid.onion/faq.php
Of course, it's not only used for a good cause. There are many phishing sites, scammers and child porn sites. But apart from the fact that you are anonymous, there isn't that much of a difference to the clearnet (normal internet). So most horror stories you have heard about Tor are just that, stories.