: The most frequently seized items in U.S. federal prisons include cell phones (47.8%), drugs (34.7%), and weapons such as shanks ( U.S. Sentencing Commission ).

: In 397 AD, the Roman Empire briefly declared pants illegal, making them a form of contraband for a period ( Reddit /r/AskHistory ).

Contraband has shaped global trade and civil rights for centuries:

Within controlled environments like prisons or hospitals, the definition of contraband expands to include "nuisance" items that threaten order or safety:

: The rules for seizing contraband were first standardized in the Paris Declaration of 1856 , which protected neutral ships from having their non-war-related cargo seized (Oxford Public International Law). If you'd like to explore this further, I can: Find current customs laws for a specific country.

: During the American Civil War, the Union used the term to describe enslaved Black people who escaped to their lines. By labeling them "contraband," Union generals could legally refuse to return them to their enslavers under the laws of war ( Dictionary.com ).

: Everyday objects like chewing gum , incense , plastic wrap , and even certain photographs are banned in many facilities to prevent the concealment of drugs or tools ( South Australia Department for Correctional Services ).