I can see dead people

A lot of projects capture images in the public - without the subjects or their relatives knowing.
Flickr, Streetview, satellite imagery, or webcams provide a sort-of timelapse view.
How many of the people on these images are already dead - when the images gets exposed?
If you browse google maps satelite imagery you sometimes reach the borderline between differently aged patches, often with even different resolutions. What are the chances to spot a person lying in its garden chair, while watching the same persons funeral a few klicks apart?