I also highly doubt that this app is designed to report gun ranges, as they are usually clearly marked on the outside of the facility.
The whole point is that it's designed to report whatever people feel like reporting. It's mean as a tool of intimidation, just like the interactive who-owns-guns maps designed to make legal owners feel increasingly threatened by theft, etc.
This whole string of responses relates to ADs. Not public "brandishing." Stick with one topic, or make it clear you're having more than one conversation.