This was a news segment on Channel 12 News in Israel. It's in Hebrew. It shows the IDF's new Laser based anti-drone and anti-balloon weapon.
It's pretty obvious why we need to shoot down drones, but the reason the IDF needs to shoot down party balloons is that the Arabs in Gaza have been attaching incendiary devices to them as well as booby trapped children's toys and sending them over the border. These have caused numerous fires and damage to nature reserves and farms.