OpenCV and other onboard computer softwares can be trained to recognize shapes, 10+ years ago there was a demo of a NodeCopter controlled small drone following red flags.
Stick the GPS coord, fly there, and once in a geofence look for a shape to crash into doesn't seem impossible given what was possible 10 years ago.
Stick the GPS coord, fly there, and once in a geofence look for a shape to crash into doesn't seem impossible given what was possible 10 years ago.