Maybe they need Machete control

21 dead in machete attack

I'd prefer if I were in an Active Killer event that they bring guns, as the shots would give some warning, people screaming and hollering are not unusual at some events, and you make not realize what is going on until they are very close. I really can see it happening here, and machetes are cheap, pretty easy to conceal, never run out of ammo, and seldom malfunction.