At the extreme of 10KM range we are taking about 2.4kg of glass maximum. Spread of over 10km. It is largely insignificant. Even if you had 100 drones startin

At the extreme of 10KM range we are taking about 2.4kg of glass maximum. Spread of over 10km. It is largely insignificant. Even if you had 100 drones starting from the same exact place and going to the exact same place you would find 24g of glass per meter. A single leftover beer bottle would be at least 6 times that amount. When you worry about stuff it is useful to do the work.