cyberspace and cybercitizens

Cyberspace starts with the 3 simple alphabets, www, which means world wide web. A person nagivating through cyberspace, is actually moving in a virtual world, in a different dimension. His address is a virtual address, nothing physical. He is actually a citizen of a virtual world, unconfined or unlimited by physical space. A cyberbeing actually resides no where if he does not state where is his residence. Or he could register his residence in any nooks or corners of the world. Or he could actually create a fictitious country with a fictitious address. Welcome to cyberspace and cyberbeings and cybercitizens. Can any country claim authority over such cybercitizens? Can they really think that they have jurisidiction over cyberbeings if the cyberbeing chooses to reside in virtual space? A blogger or forumer in cyberspace posts or speaks to the world and not to a particular country or remain in a particular country. www connects everyone in cyberworld into one world, no boundaries, no govt, no laws. Why should cybercitizens register with national bodies and subject themselves to the rules and laws of a country when their existence is in a virtual world?