Most of the complaints boil down to "we don't trust the police to do their jobs" or "we're afraid of strangers (both homeless men and possible outsiders)", but couched in terms that obfuscate such simple-mindedness and lacking any proof besides. 

And then there's the popular "think of the children" - only this time, it's college-age children, and the college itself doesn't seem to mind the shelter. Plus, what can a bunch of strangers(!) do that college students won't?