@Hawker,
...snip...
Who own's you? Who own's your spouse? Who own's your children?
The problem with your analogy is that society is not a group of friends playing a video game. You don't get invited to be part of society and you can't ignore the fact that your actions have consequences for other people in society.
A better analogy is an apartment block. At the owners AGM, one owner says "Hang on I never agreed to the stairs being cleaned 4 times a month. When my father bought this place 40 years ago, stairs were cleaned twice a month. You guys are spending money hand over fist and the management fee is going through the roof. And its on stuff I've opposed at every meeting. I want to withhold my management fee because I never agreed to all this stuff."
I've been the head of a residents company in financial difficulties where people who themselves were broke made this exact argument. But if we have voted and the majority said to clean the stairs four times a month, I can enforce collection. Mostly people realise that the administrative costs of fighting are a waste of money and pay up.
Taken to a bigger scale, we have common needs that must be met and taxation is the means we use to pay for them. There is no invitation to join - you inherited the citizenship. You may not agree with where the money goes but its up to you to change the system. There isn't really a way to opt out/move away but that's the limit of the analogy rather than of the logic.
You didn't even attempt to address any of the questions that I asked. Where do you get the idea that libs don't know that our actions affect others?