As a professional accountant, I used to study this claim that the IRS taxation system is a facade and "voluntary".
This is actually an internet deception being spread around. I may agree with the core claim that the IRS had no original legal authority to do anything. But even lacking any real legal authority, they were granted jurisdictional authority to enforce their system.
It's not just phone calls. They'll bust into houses at gun point, seize assets, seize records. They'll do this even if you claim they have no legal ability to do this. So this thing on the internet is disingenuous.
They should talk about all the disaster cases where people attempted this and ended up paying huge fines, going to jail, ect. I'm all for sticking it to THE MAN. But be prepared to live your life in perpetual lawsuits fighting never ending battles with the government. Easier to just pay what they think you owe.
"Any person who willfully attempts to evade or defeat any tax imposed by this title or the payment thereof shall, in addition to other penalties provided by law, be guilty of a felony and, upon conviction thereof: Shall be imprisoned not more than 5 years." - https://www.irs.gov/compliance/criminal-investigation/related-statutes-and-penalties-general-fraud
Claiming you never owed it wont lift a felony tax evasion if the court thinks you do owe it.
Yes it is true that the IRC wil use force even though its illigal force it will be done and they wil not be held accountable by the system for using force to extract taxes. Hence "it wil not be easy". But no its not a deception, because most videos about this is very clear in pointing out that " the law does not exist" not claiming that you can simply stop paying it and nothing wil happen. ITs also true that its easy to conclude that you can just stop paying it, but that is only if one do not know how power hungry the system is.
So what I see as needed to get away is either being an individual with lawyer friends and alot of publicity and doing it openly, or being a large local community that does this together and backing eachother in the event of illigal enforcement happening.
As looking at your ending quote, its 100% true what jeff and others directly claims, that taxation is theft at the threat of violance / at the point of a gun. In other words; equivilent of a mafia organisation.
In the end it comes down to; to what degree you are willing to take up the fight against corruption and injustice.