Yes, they do. But these birds are at risk of predation. Even if people stay outside with their flock, the birds are at risk of predation. I've read countless posts where people tell stories about how a hawk swooped down on their bird or a fox darted out of the woods and snatch up a bird "right in front of me!".
Probably one of the best deterrents to predation is a good livestock guardian dog.
Personally, I don't free range any longer. I keep my flock inside about 1/3 acre pen constructed of poultry netting powered with a 10,000 volt charger. This has kept them safe from ground predators. They have a huge old style quince bush they hang out under plus their solid roofed run for protection from aerial attacks but they are still vulnerable to that. I found a frustrated hawk sitting next to the quince bush one day and the entire flock in an uproar when I went outside. The rooster alerted and everyone went for cover. No one was injured.
Whenever you allow your birds out of their predator proof enclosure, they are at risk of being killed or injured.
Whenever you get in your car and drive 65 mph somewhere YOU are at risk of being killed or injured. But I bet you still go out... It's all about mitigating the risk to enjoy life.