There is no guarantee the helicopter will be coming from above. Aerial firefighting is a very low level activity, well below the operating ceilings of RC planes

There is no guarantee the helicopter will be coming from above. Aerial firefighting is a very low level activity, well below the operating ceilings of RC planes/multirotors. Many of the commercial drones you can buy weigh north of a kilogram, and contain a fair amount of aluminum and copper. It is very likely that would result in a very bad day if it were ingested by the turbine powering the helicopter.