Years ago while leaving a restaurant I observed a couple struggling with a child who was having a temper tantrum. . .they resorted to beating on the child to get him into their car. I simply commented. . ."stop beating that child". I was cussed and advised to mind my own business to which I responded "how about I call the police?". The beating stopped and they drove off. My young son observed all of this and has never forgotten it. Now that he is a father I see the same protective attitude in him; not only for his child but also for others.

See something; say something. Be prepared to do something if need be.