I live on a cul-de-sac and there are three outdoor cats belonging to two of my neighbors. Since the road gets very little traffic, they're pretty safe. They have collars/tags and just roam around our homes. I normally get a chuckle out of coming home and they're just sprawled out on the road, at the base of the circle. I've caught them a few times, perched on my fence post, stalking birds. And when I mow, I will occasionally find some bird remains. All three cats seem super happy to be outdoors and come over for some attention whenever someone is working outside in their yards. Personally, I don't think they'd be nearly as happy if they were forced to remain indoors but I do realize that not everyone would feel comfortable letting their pets roam free.