Not necessarily. USAPA is now the official bargaining agent for the entire LCC pilot group. If they fail in DFR, the AWA guys can still sue USAPA and the USAPA officers.
You really need to think about what you just said. If you do not pay dues to the union you have no legal right to sue the union for a DFR if you are not a member of that union.
If you do not join you can not sue. Ask you high priced lawyer.