There are many such sites out there, like Overture/Yahoo and Google.
These sites purposely exhibit no different behavior based upon things
like the header order, however, when it comes to customer billing and
affiliate payment time it's a whole different story. Click fraud and
click fraud detection are huge markets worth literally billions of
dollars, the sum total of all "pay-per-click" advertising programs.
Adware, popups, viruses, and email spam exist mostly to generate click
fraud.

Jason

Daniel Stenberg wrote:

> On Tue, 11 Oct 2005, Jason Pump wrote:
>
>> This is an issue if you are trying to simulate the actual behavior of
>> a browser. People, for instance, writing a click-fraud script would
>> find this problematic.
>
>
> I've been writing libcurl-using programs and scripts that impersonate
> browsers for many years and I have yet to find a site that detect
> browser based on header order.
>
> But of course, if it would happen and I really wanted to make my
> program still work with the site, I'd introduce an option that would
> dictate the order of the outgoing libcurl headers. ;-)
>
Received on 2005-10-12