A person who, either by himself or with another, (a) wilfully deprives a member of the National Guard of South Carolina of his employment, (b) prevents such member from being employed, (c) obstructs or annoys a member or his employer in his trade, business or employment because he is such a member or (d) dissuades or attempts to dissuade any person from enlisting in such National Guard by threat of injury to him in his employment, trade or business shall be guilty of a misdemeanor and, on conviction thereof, shall be fined in a sum not exceeding one hundred dollars or imprisoned in the county jail not more than thirty days.