This sounds like an idea that seems fun and good on paper, but is never going to work.

Let me get this straight:  Your app basically allows people to report "potentially dangerous situations", and in return they get a fee if there is indeed something prevented or do they just in general get a reward?

I'll just go to a concert/even make 200 pictures of people's backpacks, and the festival managers are going to check all 200 of them?

Your idea seems extremely far-fetched, don't you think? What am i missing?