In my world there are crazies.
The way to know if someone is crazy is by staring at them; if they stare at you for more than two seconds, then you know they’re crazies.
What you have to do in that case is never stop staring, because they’ll come to you.
Don’t run away, because they’ll chase you.
You keep staring and call the crazy helpers (you should have a panic button, or memorize it, because you can’t take your eyes off the crazy). They’ll come and take him.
So this is the rule, but many still don’t know it, so in my world you still have half the people standing and staring at each other, and the other half chasing and running away.