Were I to find out that the software in the OP exists (no sign of it in a search, perhaps my search fu is lacking today), the following steps would seem to be in order:
Obtain pre-paid phone.
Register under favorite anti-gunner's name and info.
Add this app.
Place in front of TV and play every movie with a shootout that you can think of at maximum volume to ensure that app picks up "gunshots".
Hilarity ensues.
Once enough people do so, the app is useless.
Obtain pre-paid phone.
Register under favorite anti-gunner's name and info.
Add this app.
Place in front of TV and play every movie with a shootout that you can think of at maximum volume to ensure that app picks up "gunshots".
Hilarity ensues.
Once enough people do so, the app is useless.


Comment