Question for readers: What can straphangers do when witnessing violence?

Menacing suspect

Photo of suspect

Earlier this week, police released portions of a video showing a man threatening a fellow straphanger with a knife after he tried to intervene when seeing the other man hit his toddler. The suspect, seen on the E train in Greenwich Village, has since been arrested.

Town & Village is asking readers for their thoughts on what sensible actions can be taken by straphangers who witness acts of violence. This can include a parent disciplining a child or an argument between two people if it appears to cross the line into abusive behavior. Calling the police isn’t always an option if passengers don’t have phone service due to where they are in a subway system.

We welcome reader feedback at or as comments here. Names will be withheld upon request.