It's a two seater. There is a second seat behind the driver for a passenger.

Holy shit that would suck. I run a useful website that users love, and without the HTTP_REFERER there would be *no way* to know where your website traffic is coming from. There would be no way to know whether a drop or jump in traffic is from a search engine change that you should be worried about, or press coverage, or whether you're getting or losing links from popular websites. Websites would get Slashdotted and never even know where the traffic came from. Or they would get banned by search engines in China and not even know why their traffic dropped.

That would be like trying to run a website in the dark, with no clue at all whether you're doing the right thing or not. I seriously hope HTTP_REFERER is one bit of good technology we don't lose.