You might want to check the Continental seniority list. Excuse me United seniority list against the scab list. They were forgiven, but not on the jumpseat.
A good friend's Father lost his job as an FE to an ALPA pilot at Eastern, but luckily got hired as a Pilot two years later, kept his Company Seniority and leaped over these said "non-scabs", and they were his SO's for his next 17 years as a B727 Captain. I bet those were some interesting flights. So 21 years later, his son (my friend) who was the member of the IAM and a prospective Pilot for Eastern, transferred from his job as a Gate Agent to take a position as a Pilot he was labeled as a scab.... Googles, Bueller, McFly, anyone????
So you never heard about the fist fights in the cockpit?