Fuck all these laws that control how we use stuff we own!
[/sarcasm]
Yes... so are you arguing that the government has a right to control how we do everything because we permit it to control some things? Where does liberty come into the equation then?
The general idea is that your right to swing your arms stops at your neighbor's chin.
The Supreme Court may have found a corporation to be a person, but I don't.
All these examples you gave are pretty weak. Disable your catalytic converter, and you have a fairly direct effect on air pollution which impacts you and your neighbors health. Roll back your odometer... there's really no reason to do that ever except to cheat someone. That's effectively interfering with an official measurement. Remove seat belts in a car... again, a safety issue.
Now, a game console. There is a legitimate purpose to doing that: running unsigned games on hardware you own (did you sign a contract saying otherwise when you bought your console?). That shouldn't be illegal, if you believe in liberty.