Where Do Students Plagiarize from the Most?

I just found a list of websites that inform most of the student cheating. It's almost enough to make you lose faith in the younger generation to see where students mostly plagiarize from: 

Over all, the top eight sites for matched content were Wikipedia, Yahoo Answers, Answers.com, SlideShare, OPPapers.com, Scribd, Course Hero, and MedLibrary.org

 If they think that Wikipedia and Yahoo Answers are legitimate sources of information for college essays, this means we have been able to teach them nothing. Of course, if instead of churning out more idiotic paperwork, our bureaucrats occupied themselves with punishing plagiarism, the problem could be eradicated pretty fast.