Lax Discipline

A mother and two children are in front of me in Musashino-line now.

The children looks 3 or 4 years old, so they made much noise when they got on the train.

The mother saw their attitude and said,

"Be quiet, please. And sit down here."

The mother, surprisingly, led them sit on the floor.

Now they are so quiet but sitting on the floor.

Making noise or sitting on the floor......

Aren't both bad manners??（￣〜￣；）