Perhaps most menacingly, the Internet's openness allows well-organized groups to simulate support, to "capture and impersonate the public voice," as Mr. Fishkin wrote in an E-mail exchange.

There’s no Visual Voicemail (voice mail messages appear in a written list) or Microsoft Exchange compatibility, either.

As early as in ancient times, people on the adoption of primitive and simple voice, body language, symbols such as the exchange of information.