Glass is an interface to native APIs. The API allows to create objects (e.g. Application.createWindow()), and destroy them (Window.close()). Therefore a Glass client such as Quantum has full control over the native object life cycle. There's a common understanding and agreement that Glass shouldn't impose any implicit/automatic native resources management - it is up to the client to free up resources when they are no longer needed.

The current implementation of Disposer machinery in Glass is empty anyway, and therefore should be simply removed.