It is unfortunate to break immoral laws which tell you what you can and cannot do in respects to your finances and associations? No, it's ethically sound to not obey any law which doesn't have an actual victim.
You didn't share your thoughts, you shared your beliefs, you didn't examine your belief on why it's right to pay taxes that pay ONLY the interest on a debt on a privately owned currency which exists only to devalue goods and services. You used the reason for paying taxes as to show thankfulness to our fellow man as a valid reason to tax people 30% of their labor, 8% of their goods at the point of sale, and insurmountable taxes added onto products and services throughout the whole process of manufacturing, as "showing thankfulness to our fellow man", because showing thankfulness shouldn't be a free choice, it should be a tip of the bayonet, you go to the cage for not resisting, you die for resisting kidnapping choice. Because pay taxes or else.