Oh wow.. I didn't even think about how this must be affecting students. Man, that sucks. @afturner had a teacher once when she was on an art program at University who was trying to get her expelled because he kept assigning her to do life drawing and he sure that she was tracing Michelangelo works and turning them in.

He kept failing her artwork and getting angry with her. Finally she took her shoe off and said "Look, it's my own foot!"

After looking back and forth from her foot to the painting, he was so embarrassed and ashamed. He wasn't very good himself and just couldn't believe that he had a highly gifted student.