U of C alerts ceratainly don't give the complete picture. I've come across several serious assaults on university property at http://www.chicagocrime.org/ that not reported in the emails.
Case no. HM535868, Armed robbery on College/university grounds
at5700 S. Ellis Ave. on Aug. 12, 2006 at 1:30 p.m.. No arrests.
Case no. HM526760. Aggravated battery: P.O.: Hands feet fist. Hospital building/grounds. 900 E. 58th St. No Arrests. Not domestic.
If I'm wrong- let me know.
Chicagocrime.org is an excellent resource where data like this can be viewed.