The Fab 5 were a huge part of my youth and a major reason I love Michigan. But when I found out they were bought, I made them and everyone involved persone non grata. And the program was blown up. Good.
For the other stuff, I think there is a difference between one-offs and a systemic problem. If M has a slush fund ala SMU or were allowing a booster like Shapiro around the program and (at least tacitly) supporting him, I'd call that a lack of institutional control. If we have that here, I say shut it down.