Dan, please use the term "scab" only for someone who has crossed a picket line. It's not to be used lightly...
Flap (or Flaps, which is it?) maybe you haven't been around long enough, but, as far as I remember, the requirement for not signing in early is because the company does not give us enough time to adequately accomplish our pre-flight duties. Signing in on time and taking the appropriate amount of time to accomplish your pre-flight duties will necessitate a departure delay.
Got it?