And that must mean every other student feels just the same as your friend(s)? Look I know that is not what you were in fact saying, but I suggest we don't over react to something if we were not in fact there to see for ourselves. That may have been your friend's impression, that there was some kind of singling out going on, but in actuality not what really went down. Last time I checked, there were also UMPD security drives-thrus/walk-thrus in every other tailgating lot on campus as well. And that is no different on any other B1G campus where their police forces make similar security checks in those tailgate lots. All of that said, I also hope as time goes on that the UMPD stays in check and doesn't unnecessarily "over-do" security in this one particular lot compared to the other lots. It would be unfortunate if the UMPD makes that mistake and gives it a "bad name". But as far as we know they have not done that.
Btw: It sounds like the student tailgate lot is expected to do quite well, and the parking passes are nearly sold out already. Check out today's story on it from the Minnesota Daily.
http://www.mndaily.com/sports/stadiums/tcf-bank-stadium/2013/09/02/students-take-over-new-tailgating-area