It is a known phenomena that many people would do things in a group that they wouldn't do alone. The group gives a sense of "protection", because even when doing un-virtuous actions, they are done in the company of others, therefore the blame (it seems) is shared and seems less heavy a burden, and so it seems, is the culpability also. This is illusory!
Within a group, to speak up and stand against something un-virtuous going on while everyone is indulging in it is a very courageous act. It is going against all, it is facing the possibility of the same torments that we witness...
I had a philosophy teacher who asked us once this very difficult question that divided us then and divides the world still today: "between the victim and the executioner, which do you choose to be?".
What is gonna be your pick?