Do you have the actual text of it? Forgive me for not taking everything from the Michigan echo chamber at face value right now.
BTW, I have cooled off on the "suspend/fire Harbaugh immediately" stuff. Not because my school was dragged in, but the argument that it is a pretty slippery slope to succumb to the mob here. Similar to the reasonable Congresspeople (Porter, Jackson) who voted against expelling Santos last week. From the Extra Points Newsletter
Also, there was a lot of stuff in the wake of the Astros scandal that showed it may not have much of an effect. If teams know they have your signs, you can game theory that. It does sound like teams were onto Michigan for a while.