[Entrepreneur]

I see a huge inundation of people getting in and overloading that app so it becomes, essentially, useless? why not start uploading every address in a city onto it?

That was the first thing that crossed my mind. Heck, where I live gun ownership would be the default setting.

[grobdriver]

why not start uploading every address in a city onto it?

Start with liberal politician's home addresses (if you can learn them), office addresses, etc.