Rosetta Code:Copyrights

By submitting content to the Goodbye Wold project, you thereby certify that its distribution does not constitute copyright violation, and accept liability associated with that violation. You also grant license to the Grand Rapids Community College Computer Club (GRC4) permission to distrubute said content.

Basically, make sure you have permission to make the content you submit publicly available. The easiest way to do this is to only submit content you create yourself. In a sense, that's almost required; you really should test code before you post it.