I'm a student at the U of C, and while crime didn't used to be a problem, there's been a weird wave of crime this year. 13 muggings in the area in the last 3 months, including someone getting a gun held to their head on the quads at 8p. Cops think it may be the same person.
It doesn't really bother me, but I could see it being a concern. I don't think anyone's been seriously hurt in any of the muggings, just some guy taking money. So whether you consider that violence is up to you.
And of course it goes without saying if you go South of 60th you're on your own.