I think it's a question of rebelling against the parental unit, your parents probably listened to shitloads of awful bands or artists like Collins, The Eagles, etc., so when you get to college the first thing you latch onto are acts that are the polar opposite of that. 
But when you get out and you've been on your own for a while, it's almost like comfort food to howl along to "Hotel California" or try foolishly to decipher the meaning of "Susudio". That, or they give you a frontal lobotamy on the way out of graduation and you're reduced to a driveling fool who actually thinks that crap is good 
And for the record, I thought this thread would be about teachers sleeping with students 
To which I was going to opine "some people learn best from books, others by example"
