Sounds a lot like my LSU games! I take my M3 to the games, never had an issue. In fact I parked near a pre-LCI E92 M3 a couple of weeks ago...
As with any situation, you try to be careful about where you park. Don't squeeze into a tight spot which will get you a door ding, look for end spots if possible (usually not!). Ultimately it is a car, my daily driver. Sh#t is going to happen no matter how hard you try to protect the car...
2011 Space Grey E90 M3, DCT, Comp. Pkg.
1997 Z3 2.8, Artic Silver, Tanin Red interior, MT
1974 2002tii, Inka, MT