The U.S. Constitution:
Amendment I
Congress shall make no law respecting an establishment of religion, or prohibiting the free exercise thereof; or abridging the freedom of speech, or of the press; or the right of the people peaceably to assemble, and to petition the government for a redress of grievances.
Freedom of speech? ... better ask your boss
The U.S. Constitution's free speech protections apply only to action by the government.
That means the government can't prevent you from expressing your opinion, such as speaking at a political rally or writing a letter to the editor of the local newspaper.
By contrast, except for limited exceptions, there's nothing to keep your employer from firing you, or taking other disciplinary action, for what you say at the water cooler, in a company newsletter, or even on your own personal blog.
Anonymity
Many people don't want the things they say online to be connected with their offline identities.
Instead of using their true names to communicate, these people choose to speak using pseudonyms (assumed names) or anonymously (no name at all). For these individuals and the organizations that support them, secure anonymity is critical.
Anonymous communications have an important place in our political and social discourse. The Supreme Court has ruled repeatedly that the right to anonymous free speech is protected by the First Amendment
These long-standing rights to anonymity and the protections it affords are critically important for the Internet. As the Supreme Court has recognized, the Internet offers a new and powerful democratic forum in which anyone can become a "pamphleteer" or "a town crier with a voice that resonates farther than it could from any soapbox."
I originally posted this in 2009:
http://www.browncafe.com/community/...m-i-free-to-speak-my-mind.230139/#post-505260