So why can't they, when receiving "man with a gun" calls, not simply ask, "What is he doing with the gun?" If he's walking down the street with it in a holster and not bothering anyone, they could easily suggest that the person isn't breaking the law and that they should not call 911 unless it's a real emergency. It's not that hard even for a moron, and most dispatchers are intelligent people who could easily be educated in this regard.
There are about 6.3 million people in Indiana. The last report I could find say there are 300,000 people with gun permits. Go ahead and say it is 400,000. State law says it is illegal to carry a handgun without a permit (if your out and about). So there is actually a very better % the person is carrying illegally than legally, just on the numbers alone. If open carry was legal w/o a permit in Indiana, then the dispatchers should ask those questions, but in most cases, cops are going to respond anyways.