You are using it to watch content that you and Netflix do not have the United States streaming rights.
It does not matter what you think, but what your contract with Netflix and international law says.
No. You log onto a paid account with a VPN. In fact I have to say you'd be pretty dumb to not use a VPN, or at least some sort of security, in this day and age. Are you suggesting people shouldn't use a VPN???
If Netflix wishes to prevent this, there is a very simple and easy technical way to do it that has nothing to do with a VPN. Hell they could also start with preventing it SPECIFICALLY with their terms of service, but they don't even do that. And again are you suggesting people don't use a VPN??? Cuz I really want to here your self righteous explanation for that one...