From a dialogue between "Teach," an adjunct philosophy instructor at a public university in New York, and "Cheat," who has authored over 100 papers for pay. Here's Teach:
My favorite case this semester was plagiarism within plagiarism. When I informed this student that I suspected her paper was plagiarized, she said to me, “I got my paper from one of the students who was in your class last semester. How was I to know that she had plagiarized?” Which indicated to me, along with a number of the other email responses I got from students, that many of them don’t even know what plagiarism is.
The Dish 