> Liberty consists in the freedom to do everything which injures no one else; hence the exercise of the natural rights of each man has no limits except those which assure to the other members of the society the enjoyment of the same rights.

> you go into a convenient Half-Price Books mask-free

The problem with this scenario isn't the liberty of the patron, but the liberty of the proprietor. Mask mandates have been varyingly enforced, but generally the government will issue extremely stiff fines or force closure of noncomplying businesses. I'm of the opinion that, like my house, under what conditions I choose to admit people to my business is none of anyone else's concern. I support the right to discriminate against masked and unmasked, shirted and shirtless, tall or short, and any other arbitrary criteria that the proprietor solely chooses.

> What is the dividing line between 'the government' and any other human institution

The government is the sole authority which is able to legitimately use force against you. They also govern public spaces, where you have a right to be, and reach into private interactions. If your family tells you that you have to wear a mask to see them, you can tell them to go to hell and face no consequences. If they beat you up or take your property, you have recourse: you can call the police or take them to court. None of this is true if the action (deemed "legitimate") is taken by the government. They can kidnap you, confine you against your will, and seize your property, and you have no higher power to hear your case.

> but it's not really very far from "round'em up and shoot'em"

I hope you're not comparing election fraud with mass murder. I would implore you to watch some videos of actual mass murders and see if you change your mind. Even a beheading video would do it I imagine.

1. http://www.hrcr.org/docs/frenchdec.html