I submitted a song recently, and voted 5 on it so that it would get to the top of the list, so that more people would see it, and I would get more comments. However, someone voted a 0 on it, for no reason, and left this comment:

"i give this a zero cause im a bad man"

The person who rated it is named Zerovoter2, and has apparently voted 0 on 101 other songs, with similar comments.

I don't think it's very fair to the authors who submitted their songs, and then someone just creates an alternate account specifically to rate 0 on all the songs in the top scores, just so that he/she can get their songs closer up to the top.