No labor organization or any officer, agent, shop steward, or other
representative or any employee thereof shall use, conspire to use, or
threaten to use force or violence to restrain, coerce, or intimidate, or
attempt to restrain, coerce, or intimidate any member of a labor
organization for the purpose of interfering with or preventing the
exercise of any right to which he is entitled under the provisions of
the CSRA or FSA or of this subchapter.