Delta pilots are UNION PILOTS. If the individual in question has chosen not to be a UNION PILOT he should not seek employment in a unionized pilot group. He is either A.) anti union or B.) self serving and doesn't want to pay his share to become a MIG. In either case you reap what you sow and the ALPA pilots on the hiring commitee at Delta need to know what they are getting.
Paying what you owe is not a gray area and is not trivial.
What is owed is service fees for not belonging,that is contractual. You forgot C....is not selfserving but does not agree with union bargaining process and bylaw changes. WTF is a SWA newbie f/o doing on this forum? Get a freakin life.