I could see that being used to create a good distraction, but spying? Haha, don't make me laugh. This looks like something I could put together with a few zipties, my old camera, and some duct tape, really...
I also think an electric heli of some sort would be better for spying... not only would the camera be smoother, but you could get much better views.
Also, imagine strapping some sort of gun or explosives to a Revo or some other rc vehicle, that could actually have a lot of uses in urban combat.
also: a rock crawler of some sort with two speeds would also be much better than a revo for spying.