This blog post[1], from the music composer Jason Robert Brown, discusses the morality and legality of copyright in the context of sheet music. It's based around an exchange with a teenager that evolves into a pretty interesting debate. It mentions Wikipedia, and links to other discussions that popped up in response. The ignorance of the basics of copyright law, and the ramifications in the Internet age, echo whats been written about (and on) Wikipedia over the years.
Also on the same subject, David Pogue and Michael Hawley (formerly of MIT Medialab): http://www.nytimes.com/2010/07/08/technology/personaltech/08pogue-web.html
[1] http://www.jasonrobertbrown.com/weblog/2010/06/fighting_with_teenagers_a_cop... --