The question of copyright violations in article histories has come up before. See about halfway down http://meta.wikipedia.org/wiki/Wikipedia_and_copyright_issues. Isis suggested that we keep copyvios in page history, because:
# The page history is an editing tool, not something we "publish" # It would be good evidence of our procedure in any court case
Is there a list somewhere of legal questions that wikimedia should (eventually) get a paid legal opinion on? -Martin "MyRedDice" Harper