Constant bit rate compression isn't a cure-all. It's generally inferior to VBR which is why the latter took off in the first place. CBR is easily degraded by just increasing the amount of visual complexity. Leaves moving on trees in a breeze is a typical problem case.

So if you're worried about being spied on, high-resolution mosaic patterns are your friend. Mirror or high specularity pigments will enhance the effect. For fixed installations a few discoballs and a laser will mess up someone's day.

Of course, if you want real security you'll triangulate on the drone signals and jam, because if you really need to do so getting busted by the FCC is probably the least of your worries.