No one in their right mind doubts that the damage was symbolical and primary reason for prosecution is suppression of criticism.
Do people of America need to proclaim another Declaration of Independence from another tyranny?
No because all governments tend towards despotism. Another Declaration would simply be resetting the clock 200 or so years before the same inevitable conclusion.
What the human race needs is a post-state society. It is my hope that emerging technologies (material sciences, decentralized networks, distributed energy production, etc) will enable the emergence of post state societies. If not then the 21st century will likely be a repeat of the 20th century, where more citizens were murdered by their own governments then criminals or foreign states.