I don't care how many sides you put on this one, there was still no reason for them to act like that. I personally don't think I needed to word anything different. That line has gotten me on every flightdeck I have ever been on. What if I did know the FO...it is non of his business why I want to talk to him. And I don't care what they were doing or how bad of a day they were having, I would rather have them lock themselves up front rather than bringing it to the cabin.
I'm not going to try and defend this Capt's actions since I wasn't present nor do I know him. There ARE two sides (usually 3, yours, theirs and the truth which generally lies somewhere in the middle) to every story (that's why we have courts) and things may not always appear as obvious as they seem.
Having said that, pilots are not emotionless robots that the FAA would like for us to be. We don't always come to work with a kick to our step or without a care in the world as we gleefully look forward to another exciting day at the office of meeting people and jetting off to yet another exotic location. There are a few I've wondered about, but most of us are human beings that come with all the outside baggage, worries and frailties associated with being, well.. human. We all have our good days and not so good days which some handle better than others. I've learned over the years that you never really know what is going on in someone else's life at any given time. We all handle pressure and life stressors differently.
That Captain (crew) may have been having a really bad day..for them anyway(maybe not for you). He (they) may have just been the bearer of bad news (may be personal or work related). Admit it, we've all been there! If you haven't then your either really young or you've been really fortunate or lucky. He may have had a prior past experience with a passenger coming up looking for.. ?? He may have been trying to protect a new f/o until finding out who you were? He may have not liked the way you look or approached him. Having been a sim instructor and taped many sim sessions over the years during training it is interesting to have the student say, "Did I really come across like that..." Sometimes we're not aware of how we come across even when we don't mean to be. You may have come across differently than you thought.
In the end, don't take it personally, or assume, or come to the instant conclusion that this Capt should be hung out to dry or is anti-social simply because he acted as if he didn't want to talk to you. He just may have been having one of those bad days that all humans are entitled to occasionally.
We don't get many visitors anymore post 9/11. Prior to that we use to get quite a few and sometimes groups of kids (cub scouts, etc) . It was always fun to talk to the kids or to the local private pilot who was just hanging around at the airport. Unfortunately, post 9/11 has closed that door of interaction and we seldom get visitors anymore. I miss those days!