Is Arne Svenson’s Neighbors series an Invasion of Privacy?

As I looked through Arne Svenson’s Neighbors series, the photographs are quite artistic. They show everyday life but in an artful vague way. I can not agree that it is an invasion of privacy because they reside in a glass house so you can not be angry if someone looks into your house. I think that he should have asked for their permission because they should have known that they would be featured in a publication. There should have been some type of consent because there are photographers they do ask if they can take your picture; it has happened to me on the F train before. I do like his photographs because they are photographs of normal events but there is depth at the same time.