What would stop the good Facebook employees from just memorializing evidence of the harm Facebook does to girls/society/the elderly/the conspiracy minded/the Ro

What would stop the good Facebook employees from just memorializing evidence of the harm Facebook does to girls/society/the elderly/the conspiracy minded/the Rohingya/etc by emailing supervisors about it and then leaking the response or lack of response? Is Facebook just going to fire the good people that still work there?