How reliable is HTTP_REFERER?

Using HTTP_REFERER isn't reliable, it's value is dependent on the HTTP Referer header sent by the the browser or client application to the server and therefore can't be trusted.

What @Kev said, plus the the visitor can change it. A more reliable source is the server's log file. It has the remote IP address from which you can get the hostname using gethostname( ) or, if you must, gethostbyname( ).

I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.