The only thing you can do to hurt the powers that be is not buying.
Can be done too. I live in a rather big city, so I don't own a car, as I can perfectly go by using public transport.
Depends on which powers for each specific choice.
Electric cars don't run on Saudi-Trump-Putin juice, so they're pretty good step in screwing those, for example.
I think producing and consuming like crazy could also work, considering how quickly Twitter turned Elon Musk from most important to least interesting figure on Earth. Wealth and sensory capacity don't appear to be positively correlated at all.
There are things that could hurt them a lot more than ignoring them.