I fear this is going down a rabbit hole, but nonetheless.
You are, I suspect deliberately, attempting to obfuscate the issue of ownership. Here are some examples:
- you legally own a gun. you use gun in commission of a crime. gun will be confiscated.
- you legally own a vehicle. you use it in commission of a crime (whether as a getaway vehicle, or striking a pedestrian). car can be confiscated.
Whether you think they SHOULD be or not, not paying taxes is considered a crime.
That doesn't mean your ownership of the house, the car, the gun are any less valid, only that the government has determined that possible confiscation of said property is a viable punishment for violation of certain laws.
If you want to carry that to the extreme - you own nothing, because the government can confiscate it.
Which makes me wonder how your grandpa "owned" that land? How did he acquire it?
You didn't sign or agree to obey the laws of the city, county, state or country you live in either.
I presume that also means you are not beholden to those, either?
As I said, I suspect this is a rabbit hole of twisted reasoning and logic that I don't overly care to get into, but the simple fact remains. Ownership of any object is tangential to the potential of being deprived of possession thereof.