Thanks for appearing to have an open mind regarding hunting. Hunting helps to keep a healthy balance of wild animals. It is less painful for an animal to die from an ethical hunter than from a predator animal. For an animal to be killed by another animal is less painful than dying from a disease due to overpopulation of that species.
My family owns land, and we hunt on it. Don't automatically group anyone as being safe, experienced and skilled in hunting; but also don't automatically group anyone as being inexperienced and careless either until you have facts to base an opinion. Here is a suggestion. Ask them to tell you some hunting stories. Talk with them to see what the maximum distance they have shot a deer with a shotgun. Ask them how far they are willing to shoot at a deer on your property. Tell them to show up that same day or the following day (if it is good shooting weather) with their firearms and ammo to show you they have the skills they claim. Have targets for them to shoot at those distances and see how they do. Also watch how they handle their firearms. Just because they are LE does not mean they safely handle firearms, but it also does not mean they are not safe either.