We are the odd ones out and let our cats roam around outside. We live in the country. They are indoor/outdoor cats. Even though they are declawed (they came to us that way when we adopted them 5 years ago) they can still catch mice and groundhogs and squirrels and chipmunks and rabbits and birds. They've also fought off all the other cats in the neighborhood and are the king and queen. They do have to stay inside from sundown to sunrise though.
For *us*, we figure that they will die at some point. It might be inside or outside. But they will have had fun outside and inside.
Of course, these are also cats that love to go on walks with us, so there are a bit weird that way. They go without any leash. Just following us. And if I send the children outside to play on their own in the woods, the female cat will follow them, giving me dirty looks all the while as if she has to take care of my children since I'm not.