You're right though, the Boxee tagging system is completely foolproof.
You still pay for some (or sometimes, all) of the class, of course.
Not always the case. I went to Purdue for Aviation Management (to become an air traffic controller) and for some odd reason they let students take computer classes in place of some of the other Gen-Ed stuff. I was able to test out of several classes, without having to pay a dime. It depends on the school.
Some people carve careers, others chisel them.