There aren't any simple legal tools to avoid it. Incorporating in Delaware gets you Delaware law for disputes about corporate governance. But legal devices like these are all but unenforceable for mass-market products. The accepted legal wisdom is that no ordinary consumer reads or accepts fine print of this kind. There are limits, however, on state attempts to reach beyond their borders.
Federal law cuts in when state laws clash.
That's how we find out whether a gay marriage in Hawaii must be given legal effect in Utah. The Supreme Court thought it was going to resolve something like that in the BMW case. BMW had sold a new car without disclosing touch-up to the paint. BMW had sold 1,000 refinished cars nationwide. BMW's refinishing policy, however, was entirely lawful in most other states.