If it is your site then you will be able to bypass the fraud detection, and if it is not your site then the site owner probably does not consider these legitimate use cases to be concerned about.

Right, I guess it's important to have some automated way of testing the billions of configuration possibilities and network/device conditions that you could expect, because they are impossible to systematically test in human-driven QA.

How else would you test your SPA against millions of different content-modifying browser plugins, for example.