Nah, just leave. Tomorrow morning. Unless you need a few days to download a few internal documents that you believe the world should see.

If you work at Facebook, I'm reasonably certain you (including family) won't starve. By delaying you will also risk losing the courage of conviction. Because anger dulls over time.

Delaying also diminishes the effect of leaving, because the causality is no longer obvious. Imagine the power a mass exodus would have! With the significance the workforce has in this sector, it would instantly become the most significant motivation to behave ethically beyond the minimum required by law.