you can certainly make something that is "ghostery proof", but (1) this isn't it and (2) it would be more complex to deploy and so gain less traction.
It wasn't about this very company, but tracking in general, which can be implemented without serving code from a third party server.
If solutions like Ghostery become the norm, there are still workarounds, and they will catch up if nothing else works.
you can certainly make something that is "ghostery proof", but (1) this isn't it and (2) it would be more complex to deploy and so gain less traction.