Apple has to go where customers and future customers hang out. They should have ads on school walls too!
Actually, they do at the school where I help. I gave some Apple posters to teachers when the fruit-colored iMacs first came out, and some of them put them on the classroom walls, in front of those impressionable minds.
Lots of young people will see those ads at Myspace. Apple wants kids to beg for iPods and iMacs. So Apple + Myspace = good sense, and maybe good cents.