Write some notices of your own. Think of six possible notices you could put in one of these places:
1 a school 
2 a university
3 a language school
4 a place where people work (bank, factory, hospital)

1) Don't runDon't smokeDon't fightDon't speak2) Don't runBe quietDon't speakDon't smokeDin't disturb others3)Don't disturb othersDon't speakDon't run4) Be quietdon't disturb staffbe quiet abd calmdon't smoke

1)Don't talk loudlyDon't yellDon' run around the schoolDon't talk during the lessonObserve disciplineDon't talk back to the teacher