A person who, with force and arms, willfully and knowingly obstructs or in any manner hinders or hurts a person attempting to make proclamation against a riot, shall be punished as provided in section 902 of this title. Persons riotously assembled to whom proclamation would be made if the same were not hindered, who having knowledge of such hindrance do not immediately disperse, shall be imprisoned not more than six months or fined not more than $100.00, or both. (Amended 1981, No. 223 (Adj. Sess.), § 23.)