The context of this is that the tracking helps prevent fraud. It's trivial for someone to circumvent it that puts some effort into it, so it doesn't work well f

The context of this is that the tracking helps prevent fraud. It's trivial for someone to circumvent it that puts some effort into it, so it doesn't work well for any but the most simple instances of fraud detection. We all, as end users, pay for this because as an end user it's much more onerous to work around because site specific tweaks to make a site work require a lot of effort.