Mich. Comp. Laws § 230.5: Mile-stone, guide-post; wilful destruction or injury; penalty.

Sec. 5.

Whoever shall wilfully destroy, remove, injure, or deface any mile-stone, mile-board, guide-post, or guide-board erected on any highway, or shall wilfully injure or deface any inscription or device placed thereupon, or who shall wilfully injure or deface any watering-trough, basin, or fountain placed upon the highway for the use of the public or for ornament, shall forfeit for each offense the sum of 25 dollars.