I know multiple people that have taken jobs at Facebook in recent years that feel it is a net negative in the world but could not resist the paycheck and justify it by committing to either by work hard as user advocates from the inside, or just finding open source work that doesn't directly exploit users to drain their resources on.

I for one have taken interviews at Facebook with 0 intention of working for them just because they have a tough process and it is good practice. Wasting some of the time and resources of an organization that inherently evil also makes the world that much better.