Most instructors are pretty take it or leave it at my school, but there are a few I have seen who it seems are determined to absolutely destroy certain students. I agree completely about just doing your best to stay under the radar, which also unfortunately means standing by and watching them tear apart some great people and make then question their life goals. I have done my best to be supportive to those people away from instructor's eyes. I don't know why they are so evil, but God they are!