It's still a useful barometer to calibrate one's own, individual participation in said public outrage.

For our own mental health, for our relationships with people around us, and to avoid being manipulated by dishonest people, it would behoove each and every one of us to adopt "innocent until proven guilty" regardless of whether we're legally compelled to do so.

Our required burden of proof can be lower than a court's but it should be higher than "unsubstantiated accusation by mentally ill family member that is uniformly denied by the rest of the family".