Since Oklahoma State has recently bought Turnitin for the campus, I found this blog post (and accompanying article) to be interesting. It seems that some students are suing Turnitin for copyright infringement.
It will be interesting to see how this one pans out . . .
I talked with my superstar grad student, Mark Jones, about this, and his comment was something like: "It will be hard for a couple of high school students to shut down a worldwide company."
But if you take that out of it, it's an interesting legal question, isn't it?