Private honesty is important, but it should not become an excuse for indifference when lies or mistreatment harm other people and one has an appropriate way to assist. Watching a vulnerable person be mistreated as though it were entertainment conflicts with genuine concern.
Appropriate responses
1. Do not forward an accusation without checking it.
2. When someone is wronged, use a safe and responsible channel to raise the concern.
3. If a matter is beyond your authority or ability, protect safety and seek appropriate help rather than acting recklessly.
The teaching calls for moral attentiveness, not confrontation, violence or acting as a self-appointed judge.