Guess what? Nobody cares! Money is nice! It buys things! And Facebook gives its employees fascinating tasks and enjoyable work!
Nobody who works on software for a living, or is employed by a company largely based around software, has any right to judge any Facebook employees on the basis of "ignoring social responsibility," or not factoring in that people will feel the pain of their actions in an abstract future.
This profession systematically ruined a beautiful field and destroyed the potential it could have had to drastically help the human condition. We lost all right to talk about morality in 1969.
Who can honestly blame them? Who has the right to throw a stone, here?