[tleb_]

A UAV is still dangerous around people even with no blades involved; a falling UAV is enough to kill. This is a real issue that companies (startups and giants from the domain) are trying to solve, which is required for unmonitored UAV in urban areas to start getting legally accepted (at least in France).

[giantg2]

Ballistic parachutes have been around for a long time. I wonder if they can use that with an audible alarm to eeduce the likelihood of a person strike.