Curfew
In The Sims 3, a curfew is given to children and teenagers to remind child and teen Sims that they need to go home. A child's curfew is 10:00 pm and a teen's is 11:00 pm.
Teens will be brought home by police if they break their curfew. If children break their curfew they will not be brought home by the police, but instead will automatically go home, or to the nearest adult family member. This action cannot be canceled.
No Curfew Police is a mod that changes the way the curfew feature works.
When a teenager is out during curfew, it gives the pertaining moodlet until a police officer catches the Sim or the teen goes home. When he is caught, he cannot run away from the officer and the Sim gets a negative moodlet and a scolding from an adult on the home lot.
To prevent getting caught by the curfew, use the "go here with..." action and have teens and children visit a community lot with an adult family member and try not to stray to lots where it is more difficult for the adult to follow. This is not useful when a Sim is trying to gain collectibles or is fishing away from home.