RemoveWGA is not a way to circumvent authentication of Windows systems and it is not intended in any way to help anybody pirate a copy of Windows. With that said, RemoveWGA is a freeware application which allows users to effectively disable the Windows genuide advantage notifications and allows users to save system resources. This sequence is not only a privacy concern, but can potentially also waste valuable system resources.
Microsoft currently has a tool which installs automatically onto your Windows system which effectively forces your PC to 'call home' each time it starts.