Free Range zons??? My mother had a clipped zon who lived in a tree out back. She slept on a perch in the laundry room. We had issues with cats,dogs, snakes ,hawks,but mostly Blue jays. In the tropics you see cage free amazons, fairly common. A few that come to mine are some very colorful ,free flighted panamas that live at the outside bar at Tropic Star Lodge in Pinas Bay panama.I've seen several others in various places but mostly in central american where they are native. My pet zons are clipped and mostly cage free. It's pretty rare we even close their cages but someone is usually home with them. They're several hens that i have to keep out of eyesight of each other, they will try and kill each other. So as long as every one stays away every one else's area ,all is good. Some of the zons can hang out together in a neutral spot, but some can't. (usually it's the very attached hens). I would think your chances would be better with a clipped then a flighted one in a cage free situation. Once again we're tip toeing around controversial topics and different situations, there;s no substitute for close human supervision in either case.
PS i feel i should add, if your keeping a zon cage free, never allow them on the floor. That should be a rule you enforce 100% of the time. Way too many dangers and trouble down on the floor.