Privacy.

Basically, after Google release Google street view, they also allow people to remove any picture which has them inside. Google’s reason was any pictures you can find on the Google street view are the same with those view you can see on the street. So there should not be any problem about showing those pictures on the internet. But from other people’s point of view, they believe that you can see them walking on the street, but you have no right to show other people how them looks like, because they have the privacy of their body, house, cars, etc. I believe that that’s no problem to show those street pictures on the internet because those are public properties. But Google has no right to show people’s face on the internet; and what Google can do is use software like Photoshop to erase those people and their properties in the pictures before they put on internet.