Check this out!
Users MUST NOT upload movies that they did not make. We will ban the IP address of any offenders and Newgrounds suddenly won't be so fun anymore. Also keep in mind that a user uploading a movie to the Portal is making a legal claim that it is their original work.
That is quoted from the Help/Faq page. This pertains to audio submissions, as well as flash.
Hey um...how the hell do i take it off O.o