Facebook is aware that its tools have damaging effects on teenagers, particularly teenage girls. They also know that troll farms manage some of the most successful pages on their platforms.
Amazon regularly hires elderly people to work in their warehouses, asking them to work 10- to 12-hour shifts in challenging conditions. They keep them motivated by praising their work ethics and promising a social experience. Amazon also has the most dangerous warehouses in the US, with twice the rate of injuries of an average warehouse.
Of course, these are big companies, under a lot of scrutiny. But for you as an individual the question is: are you ok supporting that?
Both yes and no are legitimate answers.
Just make sure you act in accordance with your choice.