Earlier quoted context omitted.
> I can't imagine attending an event where people could carry concealed weapon Have you ever been to America? If so, you have almost certainly already attended countless events where somebody in the audience had a gun. The staggering majority of the time there are no incidents, so it is easy to overlook this.
Really, really depends on the state. If from a May-Issue state there is a good chance the only interaction a person gets with someone carrying is the police.
The trick is concealed. The general public, even in cities in red-states, typically only sees guns when a policeman is carrying it. Open carry protesters provide exceptions to this, but most people are not particularly interested in open carry.