There is a fascinating article at http://www.theverge.com/2013/3/19/4120548/calm-before-the-swarm-domestic-drones-are-here that covers the topic of drones, current and future usage scenarios. You should read it. You should also watch their video. Excellent information you should absorb and think about.
I tried to get their video embed code working but it doesn’t work well. Be sure and watch it. It’ll freak you out. Trust me.