If you see a concerning behavior and are comfortable intervening, deal with it directly by interacting with one of the people involved.
When you recognize a high-risk situation and you either feel uncomfortable saying something or you feel like someone else is better suited to handle it, delegating the responsibility is an option. This approach allows for a shared sense of responsibility among community members; you don’t have to intervene alone. Sometimes you are not the right person to intervene but finding someone who can is important.
The focus of this approach is diversion. If you see a high-risk situation, thinking of a way to divert the attention of the people in the situation may be the most effective option to eliminate potential harm.