Unless otherwise instructed, I wouldn't think of laying my hands on someone elses child. We had a guy at the mall during Christmas get his foot tangled in the front wheel of our daughters stroller because it was so crowded he couldn't step back and he got angry and pushed the stroller away with his leg. Luckily, mall security saw it happen....I didn't have to explain why I had the guy by the neck, bending him backwards over the top level railing.