Virtual doorbell

Many people are concerned about the recent introduction of Google's StreetView feature. To many, it's maps and associated photography form a breach of privacy. People are worried that anyone could be looking at their house without them knowing. [Who knows, perhaps Google also associates visible Wifi ids?]

Perhaps there should be a scheme to allow email addresses to be associated with specific lat-long locations [Streetviews], and that the system messages that email whenever it's being viewed - so that at least you know you're being observed.

{Further restrictions could be introduced to force Streetview viewers to register their-own details, so that the details of the viewer's domicile are sent to the visitee's email address.}