It is unlawful to place commercial advertisements in a cemetery.

The Law Explained

Maine fiercely protects the sanctity and peacefulness of its graveyards by making it a crime to post billboards or commercial signs on cemetery fences or tombstones. Early 20th-century advertisers were known to aggressively place posters wherever there was open real estate, prompting the state to step in. The dead, it turns out, are a terrible demographic for consumer goods anyway.