I watched Ferris Beuller's Day Off last night and it occurred to me that Ferris isn't a very good guy to Cameron, either.
He basically steals Cameron's dad's car, dines and ditches at an expensive restaurant, engages in several attempts at identity theft or impersonating an authority, altered or destroyed public records, and hijacks a parade in a narcissistic drive to make the whole thing about himself, just to have a fun day and not take his Econ test that he probably failed to study for. And ultimately, at the end, leaves his "friend" Cameron to twist in the wind when the car gets destroyed, a major thing, while he himself is more concerned about not being found out of bed by his parents, a pretty minor thing.
**** that guy. Rooney knew EXACTLY who he was dealing with and was right to try and nail him.