I often go out of my way to comfort a mom with a young child why may be having a bad day. I am not talking about a kid being a brat, but one who is tired and maybe a bit cranky. Even a simple smile and hello works. I once was in a public area with a mom with a young boy, obviously handicapped (I guessed autistic) who was having a stress meltdown. The mom was stressed, and appeared embarrassed by people watching her as she tried to calm her son. I quietly stood between her and the people watching (blocking their view) and gave her some quiet words of encouragement and support. The nosy people moved on. I hung until the boy was calmer. She thanked me. Having worked with people with disabilities, I knew what a challenge they can be.