A guy got close enough to shoot at and almost kill a Presidential candidate during the last election -- imagine how different things would have been if he had just used something like this[0] instead.
The first time someone attacks an outdoor music festival with drone strikes like that asshole who shot up that concert in Vegas is going to change society for the worse. :-/
[0] https://www.youtube.com/watch?v=qrZ1aH5gtMU&pp=ygUVd29ybGQnc...