I only left Comair back in March for NJ so I still feel a connection with the regional pilots. Not sure what that captains problem was, but I always acknowledge the crew as I am getting off the plane. That is if they are standing in the doorway. I obviously won't stick my head upfront since I don't feel that is necessary. No other paying passenger would do that. Well, maybe none, but most other paying passengers.
Have a good day.
Jrmyl