There is two sides to every story. Even if you fully trust the guy, you only heard one side. I don't know the circumstance, but I would wonder why they were in the zone or felt the need to walk through it?
Below is what is says in the reg book:
Safety Zones: It is unlawful to hunt for, shoot at, trap, take, chase or
disturb wildlife within 150 yards of any occupied residence, camp, industrial or commercial building, farm house or farm building, or school or
playground without the permission of the occupants. It is unlawful to shoot
into a safety zone, even if you are outside of the zone. Driving game, even
without a firearm or bow, within a safety zone without permission is unlawful. For comparison, think of a safety zone as about one and a half
football fields. Hunting on hospital and institutional grounds, and in cemeteries, is also prohibited. It is unlawful to discharge a firearm within 150
yards of a Game Commission vehicle whose occupants are releasing pheasants. The safety zone for archery hunters statewide is 50 yards. This also
applies to crossbows during any season where they can be used. Archery
hunters carrying muzzleloaders during any muzzleloader season must abide
by the 150-yard safety zone regulation. Around playgrounds, schools, nursery schools or day-care centers, the safety zone remains 150 yards.