1. You also chooose your participation in government.
2. Right, so because Mr. Z. et al., don't have a 'license to kill', there is a difference. This is the only difference.
3. Which do you trust more, McDonalds or Congress?
If I don't want to be subjected to any country's taxes or laws, let me know how I can opt-out of this. You can relocate to a different country, but it is up to them to allow you to enter and/or settle, so the problem hasn't been circumvented.
On the other hand, I can choose to not have a Facebook account, and can use various browser plugins to stonewall their efforts to track me on the web.
so don't relocate to a different country
The question is, trust more to do what? Not kill or imprison innocent people on a mass scale? I'm going to go with McDonalds on that one. But I wouldn't eat their food -- and notice that I have the choice not to.