They will have to allow shirts expressing other opinions and the faculty is pretty much screwed either way.
Seems like wearing a shirt like that in public is an open invitation to getting your ass kicked when you least expect it anyway.
I remember a kid back when I lived in New Jersey wearing a shirt that said A little radiation never hurt anyone! in the wake of Three Mile Island. Neighborhood parents were not amused. We were living about 75 miles from Harrisburg.