Mr. Ballentine implies that the library would be a safe place to drop off his children or grandchildren if there were no homeless people there. In fact, this is a false sense of security. No public building should be considered a safe place to "drop off" children. Dangerous individuals can't be identified by their clothing or odor - or lack of odor.
That said, we should all be working to ensure that every member of our communities has access to food, clothing, and a roof over their head.