Feature request: Server header to initiate private browsing

I am asking all browser manufacturers to implement a new feature for the protection of the internet user surfing websites where they may wish to have no information stored, e.g. websites dedicted to reporting child abuse, crime, divorce etc...

http://groups.google.com/group/mozilla.dev.apps.firefox/browse_thread/thread/22e d0734bae0bedf#

The idea is very simple. The server sends a header

X-privacy: private

to the browser and the browser automatically switches to private surfing mode. This would be of benefit because currently people have to choose to start private browsing before entering a website where they may not want details recorded on their computer, e.g. cookies stored in the cache. The ways of clearing the cache and history are quite long winded, so if the manufacturers were to adopt a de facto standard that a website can easily implement, then automatically the user is protected. There is room for an "X-privacy: optional" header where the user would be requested if they would like to surf in private, but for most purposes it would be desirable to adopt a default of privacy being respected much as it is a default to accept secure connections using https:// or to open an email program when a link has mailto:xyz@example.com added to it.