It is unlawful for any person to wilfully destroy or damage any facility of the district, or equipment used in the operation of a facility, to interfere with a member of a fire department in the discharge of his duties in the district or to interfere with any fire apparatus used by the fire department in the district. Any person violating the provisions of this section is guilty of a misdemeanor and, upon conviction, must be fined not less than thirty dollars nor more than one hundred dollars or be imprisoned not exceeding thirty days.