I find the technology and engineering behind this extremely interesting, but on the other hand the potential end use of this very scary (if used inappropriately

I find the technology and engineering behind this extremely interesting, but on the other hand the potential end use of this very scary (if used inappropriately by the wrong people). The fact that today we can already buy a UAV for under $1,000 and a 4k camera for $500 (http://www.lehmannaviation.com/la/la100.php http://www.lehmannaviation.com/la/la100.php) just gives you a sense of how easy and fast this type of surveillance is evolving.