It is illegal to wear a tall hat in a theater that obstructs the view of others.

The Law

During the late 19th century, fashionable women wore massive, elaborately decorated hats that could easily block the stage for anyone sitting behind them. Theater owners and patrons grew so frustrated with the plumage that local governments actually stepped in to regulate indoor headwear. It serves as a hilarious reminder of when fashion literally became a legal nuisance. Taking your hat off at the movies is not just polite here, it is the law.