My sister works in a large (box store) book store. There is a sizable children's section at the back and it's not that unusual for parents to leave their kids there while they wander in other sections of the store.
Enter SS. A mother comes in, parks her two kids (early school age) in the kids' section and is then seen by an employee heading out of the store. A manager is alerted and goes chasing after the mother. Manager caught up to mother in the parking lot and said "You will come back and get your children. They cannot be left unattended." Mother wasn't impressed, complained that she was just going across to big box furniture store waaaaayyyy across the parking lot, but did go back and get her kids. Yay, manager!
As an aside, although the store is well staffed, being a large bookstore, there are many shelves and not always clear line of sight and therefore...hiding places. A couple of years ago, a man was arrested and later convicted of exposing himself to a child in the children's section of the store after she had been left to read there on her own.