That is what tax is meant to be... But at the end of the day, what happens if you refuse to pay? Eventually, either the money is taken without your permission or people will show up to put you in a room under threat of violence

Yeah, this is coercive. That's what happens when you continuously act in bad faith in a community - eventually, people get fed up. This is just the chaotic version rather than the lawful one. It bypasses the states monopoly on violence, but it's also a very pure expression of the will of the people