Last I heard in my city they were only using them in certain areas. But yes they do have that tech. They may have expanded it here because they really cracked down on people shooting straight up into the sky. They made a new law for it and everything. It doesn’t stop it though. Guy at my work had a 40 Cal round come through the roof onto the floor in front of his desk. He didn’t want to sit in there for a week. Another friend of mine had one go through his roof and out the window on his truck. But that was in a different city.