Taken from a recent news post by Newgrounds founder and CEO Tom Fulp.
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I want everyone who creates content to read this post very carefully and take it very seriously.
The next time you are inspired to make an animation about a cool song you heard on the radio, DON'T, unless you are comfortable with the idea of only sharing it with yourself and a few close friends. Otherwise, take that inspiration and find a song you have permission to use. There are thousands of artists in the Audio Portal who are available for that sort of thing, as well as independent artists across the web who can be contacted for permission.
The next time you need art for your game or movie, DO NOT image search Google and grab something from the results. Many of those items are registered with enforcement agencies that will levy strict penalties for unlicensed use.
I know the web and Newgrounds have been like the wild west, but times are changing.
Newgrounds will be a better place if everyone here learns to work together instead of turning outward for resources. If you need a background, song, title screen, etc., someone here can help you with it. We will continue to work to make that easier, because there is no alternative.
If you are starting a project now and hope to be featured on NG when you're done, keep this post in mind. Content featuring original art and audio will be king. Parodies are still fair game and part of our culture, but you've probably already noticed only a handful of sprite movies have made front page this year.
Also dicks are still ok.
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If worse comes to worse, I would hope the Compendium would be happy to host my work.