There's a bright decorative sign when you go to submit audio, it's practically slathered all over the guidelines, yet there is still audio theft day after day. No wonder people are turned off by any music from Newgrounds.
I'm not sure if you have this in your guide, but the way I look for stolen audio is I search up an artist's name. I know of a lot of dubstep artists and just about every GD player uses a dubstep song for an overused trend called "circles levels". I know artists like Skrillex, KDrew, etc. don't have a Newgrounds account so I'll type in Skrillex or Datsik and find about 100 audio submissions under that name.
LexRodent
Ass-kickin' guide !
ADR3-N
Thanks! Hope it helps. If you need a hand, btw, don't hesitate to ask!