It reminds me a lot of the situations where Law Enforcement Officers won't follow along for what they know is not right when everyone else is doing it, despite knowing that if they leave that's one less person to stand up to the unethical, there is a point when you can no longer even associate with the group because of the very real blame you'll start to share, and rightfully so. And in the case of LEOs if you're not going along with the rest of the gang, you could very well be in danger.