One of the first resources for sustaining anonymity was the anonymous remailer. Internet users could email a remailer, and the remailer would forward the message anonymously to the recipient. There are hundreds of sites and services that provide anonymous remailing to clients. W3's anonymous remailer is free to use.
But just because these remailers are available doesn't mean they are ethically sound. The ability to send anonymous letters instantaneously, and for free, demands some regulation in order to prevent abuse.
In contrast, Robert B. Gelman wrote:
"Some people are concerned that anonymous remailers are too subject to abuse.
While it's true that they can be misused for making threats or slandering with
impunity, our society has long recognized that the value of having anonymity
available greatly outweighs the risks of its abuse. And we have historical
precedents to support that belief -- from the pseudonymous Federalist Papers and
centuries of anonymous political pamphleteering to contemporary and very widespread
implementations of anonymous systems, such as paper cash and pay phones." (Gelman, 62)
According to Gelman, America was found on a tradition of protecting free speech. The anonymous remailer is merely an extension of that right into the information age.