Ok so this is more of a rant than a thing.  Say you want to setup a network in your home or small business, 
you might look online on how to do this.  You might run across NAT or Private Networks.  And then again you might ignore all of this
or not even look for it.  Or you might find an example in a Microsoft book or web site.  The only problem is that they
used one of thier live domains as an example.  If you have done this please don't do it in the future.

Just a hint you should use non-routeable addresses for your private address space.  That is all.