I think there is an argument to be made of having an independent repository of crime data. Open crime maps are not the panacea, however, it is an excellent start. The administrative cost to execute is minimal because the data is already being collected, and there exists companies like mine that will do it for free.

Having google as a platform affords massive resources and sustainability. While other mapping systems may exist, it would seem the public will gravitate to a format that is common and familiar. Ease of use and access, should increase usage, awareness and sharing.