Not trying to be purposefully antagonistic but water can cause some serious harm when fired out of a high-pressure hose (e.g. the types used in riot "control" s

Not trying to be purposefully antagonistic but water can cause some serious harm when fired out of a high-pressure hose (e.g. the types used in riot "control" situations). Fly the drone low enough and you have people in the "firing" line. EDIT - (although, I hope they would realise they do not need the same level of pressure to knock a drone out of the sky. On the other hand, they have the cannons anyway so they might just use those to save having to have a smaller "anti-drone" one.)