I don't believe that is right. In non "right to work" states, I believe the employees can be strong armed into pay a portion of dues, but Taft-Hartley Act of 1947 prohibits mandatory membership. So, if I get a work at the hub, payment of dues can be a condition of employment, but federal law prohibits union from requiring me from becoming a member, thus forced to abide by bylaws. I have the right to not become a member and union can't discipline or fine me for working during a strike or doing things they don't like.