Yeah you’d have to be an off-grid mountain man, basically. That’s why so few do it, but some do!
Hrm… come to think of it, there are some people who would want to have a list of off-grid mountain men (hunters of potential immortal vampires? or perhaps to ensure that such people have their… ahem “votes” properly counted?), so even then there surely is a list, or rather a few thousand lists, of such people? Perhaps all people who have not bought anything for the last 5 years but for where an obituary has not yet recorded their deaths?
(Unfortunately) where there is a will, there is a way!
Ugh, you’re right. They may not be able to find you to sell you shit, but they can still piece together the you-shaped hole you left behind.
Bold thought: occasionally visit a website with privacy trackers off? Confuse the fuck out of them too with conflicting input. :-P Don’t just protect yourself, protect others by corrupting their databases:-D. Don’t just resist culture, counter it! Tbh I don’t really care enough to do any of this, but it is fun to think about:-). They can try to characterize me all they want, but meanwhile… uh actually I want & struggle to try to do that too, so I can say good luck with that task MFers! ;-)