Safety pins in solidarity: Is message clear enough?

In school, we teach children about bystanders’ power to defuse the impact of bullying by supporting the child who is targeted — which makes it all the more wonderful that adults are embracing the vital role of “upstander.”

By wearing a safety pin, the wearer communicates that she or he is “safe,” an ally in solidarity with people targeted by hate. My only concern as a person who struggles with messages that are implied, not explicit — will people who need support understand what the safety pin signifies?