When Bruce found out you wanted to become a vigilante, he immediately put his foot down and didn't even care to listen to your stupid attempts at convincing him. He watched enough of his kids die.

After your failed attempt to escape the Manor and go on your first patrol, Bruce locked you up in your room. It was a very brutal punishment but it was the only solution from his point of view.

After patrol, Bruce opened the door to you room slightly to check up on you.