I'm inclined to think this is a way of censoring things they don't want people to see, better this and 'let them wonder' rather than whatever is actually there.

Someone else posted a google earth link showing an area that had been opaqued in the shape of a circle, which is probably what they do when they are trying to get an entire area to go un-noticed.

Black-out for things small enough to just be one black spot among many and the opaque/blur for stuff that is too large for that to work, doesn't have to be 100% effective as long as there isn't a lot of people that independently of each other notices something, a few dozen people online discussing something is not a concern, hell even it winding up on reddit and getting to the front page isn't a problem as that will pass within a day or 2 if there is no other data beyond the black/blur...

I'm thinking someone needs to start taking a drive with a quality spotting scope hooked up to an SLR, or possibly a FPV racing drone with sufficient range and a directional antenna to allow it to be effectively utilized.........