Let me relay a story to you.  My church in Chicago does an annual day of service as a way of introducing parishioners to volunteer opportunities in the area.  Everyone gathers outside the church in the church plaza at the beginning of the event.  Two years ago, as the day was about to begin, a Black male parishioner was part of the throng milling around on the plaza waiting for the event to start.  He was accosted by fellow parishioners (they were White, but race is only ancillary to this) who told him he had no business loitering there; there was a church event taking place; and he should get out of there.
Perhaps this example will illustrate the risk in allowing individual people to decide the guilt or intent of the actions of others with firearms.