Its the city center of the UK's 2nd largest city. Course its not going to be 100% crime free but worrying / spreading panic isint going to make it safer. The campus feels safe despite it being open, the uni security are a bunch of great guys, Ive always seen cops around (on both the streets and broad street always have them,even undercover ones). Travel in groups (esp after a night out)...always let someone know where your going..dont walk in shady alley ways etc.
There are places you shouldnt be at in the dead of the night say digbeth but thats really it.