unwelcoming out of state public university info session/tour

Where did you get the numbers? For admission, there are more OOS than in state at UMich due to the 2.5 to 3 fold difference in yield rate. But for enrolled freshmen, there are still more in state than OOS (around 40% from OOS).
http://admissions.umich.edu/apply/freshmen-applicants/student-profile
http://www.annarbor.com/news/university-of-michigan-sees-increase-in-out-of-state-students/