most pointless class? in college - i'd have to say it was "Transport Phenomenon" You see, it's supposed to be the study of electrons travelling through semi-conductors on a physics / quantum level (i was a computer engineering major) but in reality, it was my teacher complaining about the staff, administration, and mistreatment he'd received during his tenure. (he was one of the pioneers that helped invent fiberoptics, apparently, and the school tried to shaft him out of the credit, etc. etc.)
so at the end of the course, he had us write a paper about some "interesting topic" that we could pick for ourselves. i wrote it in 3 hours, handed it in as my only work for the whole semester, and he gave me high honors. cake.
in high school i overloaded on college prep courses and stuff like that, but if i had to pick one, i would say general health, because it was like "well, duh, that's where babies come from???"