A recent article in the The Chronicle of Higher Education suggested that we should rate professors beyond simply their teaching skills. Different icons indicate different world views and lifestyle choices.
For example, the article states that the “Lump of Tofu Icon” means that:
the student is suggesting: “I gather from all of your references to vegan dietary ethics and your frequently expressed contempt for the eating habits of our fast-food nation that you’re taking good care of yourself nutritionally. That internal health may not be reflected in your sallow complexion, bird’s nest of unkempt hair, and lethargic demeanor, but I’ll take your word on this one, nevertheless.”