When you smile at people on the street, they turn away like you're trying to sell them something.

You can't try this here in my country, Nigeria except you are smiling at known people who happen to cross your path while on your way. Some would think something is wrong in your head that makes you smile without a reason. Lol
Everyone mind their business.

I love how the kids act confidently around adults and it shows how trained they have been and being taught how to approach and talk to people especially adults.