Vanity GUIDs

Heard about Vanity GUIDs , Apparently these king of GUIds are ubiqu but have pattern to them embedded in their text . They can be used for Branded software (e.g., your company or product ID), Debugging (no idea) or humor read this article for more on C#411 . And you can see some code there to make them.
I foound a comment down there interesting
Mike writes:
You can't guarantee that a System.Guid will be globally unique either, to the point of it being fairly pointless using the Guid class to create a few billion GUIDs just to force retrieve what is essentially a manually created one anyway.
may god have mercy on your soul

Its usage might get a little offbeat.