No person shall without lawful authority attempt to or in fact alter, deface, injure, knock down, or remove any official traffic-control device or any railroad sign or signal, or any inscription, shield, or insignia thereon, or any other part thereof.
Interference with official traffic-control devices or railroad signs or signals
Miss. Code Ann. § 63-3-319, under Traffic Signs, Signals and Markings.
Miss. Code Ann. § 63-3-319