It's already been established that the game host is god of that particular universe - after all, this is where the term Wrath of God originates.

Since this is the case, and since the host is always aware of the rules, roles, and actions taking place, let us further assume that the host is not merely a god but also an omnipotent one.

Taking the above for granted, since the host is also the narrator, it can be logically reasoned that the host, in the course of his/her narrations, is also the one who is driving the action in the first place - i.e. the host is actually doing the reveals upon death and not the remaining townies. Because of all this, it can be reasonably concluded that the omnipotent host/god is making the lynched person's alignment known to the general public and thus Dp101's "what about transformation upon death" argument, while in the right place, is invalid due to divine intervention.