Doug Johnson had an interesting post on his Blue Skunk Blog today about plagiarism and the internet: http://doug-johnson.squarespace.com/blue-skunk-blog/2006/6/26/preventing-plagiarism.html
This is exactly the type of thing I talk about with my students. It's time for us to be innovative as instructors. We can't keep doing the same things over and over again and complain about the educational system or that students aren't learning. I think a lot of the problem is not just lazy students, but most definitely lazy teachers. It's easier for them to do what's always been done than to try to innovate and change.
It's times like this I feel blessed to be an instructional designer. Though that at times does cause me problems (because I feel inclined to almost completely redesign each course every time I teach it).
It's like I tell my students: Good teaching is hard work.