[CyberCowboy777]

"It always boils down to whether or not you can persuade someone else to do something voluntarily."

You will never get a 100% of agreement. So someone "might be minimally constrain of individual liberty", is that wrong?

80% of us might agree that we need a state highway system and apply a tax. Must we get 100%? If not someone might be constrain of individual liberty.

[CubicleGuy]

80% of us might agree that we need a state highway system and apply a tax. Must we get 100%?

Not if only 80% of the voters actually use the highway, and if the highway can be funded by using the taxes from only 80% of the voters. A libertarian who votes against the highway and doesn't pay the tax on it and then uses it after it's constructed is acting immorally because he's using something he didn't pay for. That would seem to be fraud or theft in my book.