Police treat sex offenders as one of those dangers.

“Operation Blackout” is an annual Halloween program sponsored by the Tennessee Department of Corrections in which authorities conduct checks across the state in “taking additional measures to keep (trick-or-treaters) safe,” according to a news release. On Oct. 31, restrictions for sex offenders include making sure they stay in their homes between 6 p.m. and 6 a.m., not have porch lights on, not open their doors for trick-or-treaters, only open their doors for law enforcement, not wear costumes or dress in disguise or be allowed to display fall decorations.