Spam is a business with growing revenue. The small business
is sending spam. The big business is selling anti-spam-solutions.
Obviously those, who's business is either one of these, try to prevent
a simple and effective solution.
So every fireman is an arsonist and every policeman a theif.
A ubiquitous and pervasive authentication mechanism has value even if there
is no more spam.
Spam provides a means to get to critical mass, once a critical mass is
established it will have value in its own right.
Phill
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