rate my professor

So, I was in the student computer lab helping a student with a numerical calculation. I couldn't help notice the student next to me was registering for classes. Here is here strategy: Look at required courses. Check available classes. Check ratemyprofessor.com. Re-check available classes. Repeat. So? What is wrong with this? I see a couple of problems. First is the reliability of ratemyprofessor (RMP). I have not looked at my ratings on this site in a long long time, but I am sure they are not accurate. My favorite RMP comment: Dr. Allain teaches astronomy 101 like it was a 400 level…