I don't know how many eyeballs Yahoo reaches anymore, but Dan Wetzel chimed in with a column they won't like
https://news.yahoo.com/sports/not-a-cheeseburger-comment-suggests-the-ncaa-is-hellbent-on-hitting-jim-harbaugh-hard-015020596.html
The weakness for Michigan if they really wanted to go to the wall for JH in court (not suggesting they would or wouldn't, but who knows?) would be that he's such a long way from a 'beloved member of the coaching fraternity" type where UM could expect any additional inside political support from other institutions.