Hate to tell you this Rick but there are "bums, prostitutes and druggies" in every big city.  While Honolulu is not really that big it has its share and they can be found from Diamond Head to the North Shore.

As for the "dirty and unsanitary stores", beauty is in the eye of the beholder.  The store that I frequent are a bit funky but the owners and the employees are pleasant and more helpful than those on High Street in Waikiki. 

To each his own...