You've spent a great deal of time and effort keeping your private information just that way... PRIVATE.
Now, we all know the reason why a domain name is an important tool for your personal blog or small business.
To website developers, the phrase "Hello World!" is much more than a greeting. Typically, when learning a new programming language, a "Hello World" program is written to familiarize one's self with the semantics and syntax. Typically, these are very entry level exercises that can be easy understood and interpreted by those unfamiliar with this new language.