All it will take is one UAV crashing into some people, resulting in horrific injuries, and the UAV will be banned, or more heavily regulated.
These UAV are not toys, and have a high potential to cause grave injuries.
These UAV are not toys, and have a high potential to cause grave injuries.
However, even when not directly overflying people, responsible UAV operators take a number of safety precautions to ensure maximum operational safety of the devices. For example, using an octocopter instead of a quad would allow a motor and/or a propeller (and sometimes even two) to fail in flight without losing control. Another example are GPS-assisted autopilots, that can monitor and enforce safe flight envelope (distance, altitude) and return the aircraft to its starting location in case of radio signal loss or low battery charge.
http://www.theatlantic.com/politics/archive/2013/07/local-an...