Whether you want to risk it or not may depend on if you live on a main road. My house is 80+' off the road and my coops are another 30-50' behind the house and I've had 2 full grown peacocks and a yearling get hit. All at different times and I was sure they weren't going near the road, oh and I also have fence across the front, which of coarse they just fly over. Another problem is if you free range, they will probably nest outside and a brooding pea is very vulnerable to predators. Did I mention that they aren't like a chicken that goes home to roost every night? Sooner or later they will probably roost high enough that you can't reach them to put them in at night.
On the other hand a breeder around me has 50 that he lets free range all summer,lives on a main road and they range in the woods next to him, he says he loses very few birds doing it, so I guess its a crap shoot. Or else I'm doing something wrong.