groovesharks.orgは安全ですか？

I created an account, then realised the music offered consists only of ripped audio files from youtube. So I wanted to delete my account and realised there was no option to do so. I then thought about contacting the site owners and searched for something like 'contact', 'impressum', 'support', 'help' and realised there is nothing like that. there is no information at all who stands behind that website. So the question is: what is the purpose of the website and what do they do with your login data? (email-address...)

***** seems only to have audio rips from YouTube videos. I clicked Rika Mayama to hear her song, "Liar Mask", but when I clicked on one of the hits, I got an audio track that said, "Hey guys blah blah blah". Sometimes I see track names that are actually another song. I searched Akiko Shikata, and when I clicked on Akatsuki, I found that I was listening to Akakakushi instead (and this one had an intro that was only on a YouTube video before the actual song). If you find that I'm wrong about groovesharks.org, then let me know. I'm more than willing to stand corrected.