It’s been a while since I’ve seen the film, but I’d say both.

Rooney just wanted proof that Ferris was skipping school, which he was. He went about it the wrong way by entering the Bueller household but he was basically just trying to do his job. He definitely gets obsessive about it but he’s not in the wrong.

Jeanie is pretty self explanatory. She also just wants Ferris to suffer the consequences of his actions.

I think this movie never sat well with me because Ferris obviously does so many wrong and criminal things but is actually rewarded for it. Sure, you should take the time to enjoy life but not at the expense of others.