Oh, wait, you're talking about emergency (mostly) broadcast messages. Like, Amber Alerts, Disaster Alerts, Extreme Threat Alerts, etc.
Disable or not as you please. Personally, I disable all but Extreme Threat; you will too, the first time your phone starts blaring at 3:00 AM (it's downright frightening, believe me!) to let you know that a snowstorm is coming your way.