Use the word Draconian (or lowercase draconian) to describe laws or rules that are really harsh and repressive.
In ancient Athens, Draco was a guy who made some seriously strict laws. So rules that are too restrictive — or just plain unfair — are called Draconian. Sentencing someone to 10 years in prison for littering would be Draconian. Some people think Singapore's chewing gum ban is Draconian. This is a strong word, so if your parents make you do chores, they aren't being Draconian. But if they make you do chores for five hours every day, that's another story.