As Karl wrote, the criminal activity committed by individuals within government has grown to be a repulsive, ever-present stench in the nostrils of free individuals.
Just as property tax is an insult to the premise of owning property, so is an income tax an insult to the idea that a so-taxed individual is a free person. Either a free individual has total ownership of his body, to include ownership of all labor and production of his body, or he is owned by someone else - a slave.
I don't yet believe violence is a solution, even though government violence has been threatened and visited on every single adult within the United States, repeatedly, throughout their entire adult lives. Instead, I choose to assert my self-ownership, and to live as the free individual I am, respecting only the Creator-granted rights of other individuals and the laws that secure such rights.
I am not independently wealthy; I'm not able to continue to live without using my body to labor. Instead, I have been making preparations to go labor completely "under the counter", and have paid no income taxes since Janurary of this year; I will never file an income tax return again. I have removed all assets from the financial system, and made arrangements to possess no property of value that can easily be identified and stolen.
The violation of individual rights is a criminal act, and while I seek to avoid confrontation with criminals, I reserve the right to defend myself against criminals of any stripe, using any means available.
I do not consent.