] On the other hand, say you%u2019ve already established
] something of an online identity, perhaps through your own
] web site, or as a frequent commenter at this or some
] other blog(s). What prevents someone else from coming
] along and posting a comment here, leaving your name and
] your website%u2019s URL to identify himself? Put another
] way, how can readers determine the authenticity of
] comments left here?

This is a nice proposal for those of us who actually use PGP

PGP-Signed Comments | Musings