You should not steal goods.
You should wait for their turn at the cash register.
You should not shout loudly in the store.
You should not spoil the goods.
You should not shout in public transport.
You should sit quietly.
You should not get up while driving?
You should pay the fare.
You should not shout at a party.
You should ask about something quietly.
You should not ignore the host.
You should behave at a party.