Are we sure that there was only one drone, and that there was only one camera on that drone? It seems like a naive design to do that, so isn't it possible that they just gave us the footage of the specific camera on the closest drone? If that's true, and it's certainly plausible, then perhaps there wasn't nefarious intent behind watching with drones (other than the nefarious intent of wanting to have all the information, ever, for blackmailing, etc...).