Below is a fascinating post from a Michigan alum 10 years ago (in other words, well before Harbaugh was hired to coach TTUN).  He provides somewhat of an insider’s look—and it is one of the reasons why Harbaugh will undoubtedly receive no benefit of the doubt if there is a close call on deciding what the punishment will be:

”My take is simple.  As someone who attended UM back when Harbaugh was QB, with some friends who knew him from HS (here in A2), it comes down to this:  Yes, he's an asshole and always has been... but he's our a-hole.  

I had mixed feelings about the possibility of him coming here as our coach but if he had been hired I would have gotten on board.  I'm confident he would have done a superb job and kicked the snot out of OSU for however long he would have been here. But he would still be a jerk... just an awfully successful and competent jerk.  I'll be rooting for the 49ers (not just because of Harbaugh though)”