Facebook has sufficient accumulation of capital to make this impossible. Build something good enough to challenge them and you will get purchased.
The call to regulate a free press (Facebook) is far more disturbing than any targeted advertising Facebook is engaged in.
I don’t consider FB a pure evil, just a potential danger. Their moral hazard is comparable to that of a heroin dealer—-they are incentivized to get you using the product as much as possible, regardless of the possibility that more than a small amount could be harmful.