> A good form of effective action would be to create and popularize to the top of the list a petition like 'Dismantle Facebook' or 'Fire Mark Zuckerberg'.

Thanks to the FB algorithm, this kind of 'troll' petition wouldn't appear on anyone's feed. And ultimately, the type of person motivated to use this for its actual use cases (building supporters for causes, or just looking for people to scam), their opinon of Zuckerberg wouldn't change one iota.