Oh my gosh, I just complained to Kohls on Saturday because some cashier leaned over the counter and started scolding a child who was with his mother. (He was making an odd, annoying noise but doing nothing else...I figured he may have had a developmental issue that caused him to do this.) It wasn't even my child or anyone that I knew but was so horribly out of line that I was furious on the mom's behalf and complained. So, I guess technically, the cashier offered unsolicited advice, but so did I. LOL.
When I was in my daughter's country following the adoption, I was routinely stopped on the streets to be scolded about an amount of skin that she had that might be showing. During the day, it was 60-70 degrees, but they keep their children very warm. Appropriate attire for that kind of day was a jacket with hood up, hat, mittens, long pants, shoes, socks, and a blanket. I did all of that, but her hat would occasionally ride up above her ears, she'd kick her feet where there was a bit of skin showing between her sock and pant leg, or she'd unzip her jacket a bit at the top. When you're pushing a stroller, you might not immediately know this, but I was routinely accosted on the street by someone tsk-tsk-tsking and bundling her back up (they didn't hesitate to take over while chastizing me in an language I didn't understand). I'd been warned that they "keep our children very warm," so it wasn't a huge surprise but still very annoying.
Upon returning to the U.S. with a 2 yr old who had never been outside the walls of an orphanage (never before been in a car, never before been in a parking lot, never before been inside a store and so on), who did not know the language whirling around her, who was grieving the loss every single person she'd ever known and was just plain terrified and overwhelmed, I had a far less than perfectly behaved child when I went out into the world. Yes, I am the mother that people have looked at and said "what is wrong with that child?!" and also the one that people have looked at and said, "what is wrong with that mother for allowing that behavior?!" I learned quickly to avoid those people because I learned pretty quickly when to tell someone they had no idea what they were talking about and to step-off. I really try to give people the benefit of a doubt on kids' behavior because without perfect knowledge of what is going on in that child's world there may be far more than what is meeting the eye.