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.