Working for Facebook is a morally bankrupt position. If you are an engineer you have plenty of job opportunities available to you and there is no excuse for you to continue contributing your labor and time to a wholly malignant organization. At a certain point one has to ask how we as an industry will start dealing with those who continue to take a paycheck from Facebook even in the face of constant and horrific evidence of wholesale ethical violations and negligence.
Minimizing the damage of collecting that information is maybe not directly evil, but helping kick the can down the road to the point where facebook is so deeply networked in our society its unremoveable doesnt seem like a high horse to be riding on.