You know I've never had this happen before, I was sitting and contemplating and legitimately disturbed by the occurrences in this game; to the extent of questioning portions of my outlook. I'm a rock as far as changing my opinions goes and ultimately they will probably be resolved back to normal with a caveat "in the event of a zombie apocalypse;" but still a game having any sort of extremely powerful message which is not positive in almost any way is very difficult to reconcile. The agency of the player is what really makes this kind of dangerous material for anyone who's apt to be influenced, not because of the violence in the game (and there's plenty of that mind) but because of the psychological damage and violence caused and received. The game starts out pretty heavy for the first half or so but after that it just keeps going down until you're in the depths of lost humanity, and that's not necessarily a place you want to be.
That said since the M rating means nothing now there really needs to be some sort of indicator to parents not to give this to a kiddie, a sort of bridge between AO and M. A game like Spec Ops the Line had some degree of this but ultimately the message wasn't of total corruption as much as it was "you were fucked up to begin with," thus the player has limited agency in events and it can be viewed as you might view a movie; but this game has maybe the most thought provoking material ever placed in a game. This is much much worse than Manhunt and if games continue going in this direction ultimately there will be another game like this in 5-10 years; and given enough malleability this could seriously fuck someone up who played it. But I guess there's a sense of filial devotion, so that's something.
Oh right it's probably one of the best games ever made.
Protip: When you reach the last encounter don't do anything.