Wouldn't it be nice if it were that easy? Unfortunately, it's nearly impossible for just about anyone to contact these celebrities.
However, our user Malcolm occassionally has the opportunity to talk with Bryan Cranston and he shares stories that Bryan shared with him with the community. In the past, he has said that he would be happy to ask him any question you have when he has the opportunity. You can contact user "Malcolm" for more information, and we certainly appreciate that he shares those with us.
Our other insider is MITM18. A few months back, he was accepting questions for an interview with Justin Berfield, but he hasn't posted the results of that interview yet. For more information on that or if he'll be conducting another interview in the future, you would have to contact user "MITM18." And we also thank him for that.
So us mods are basically normal users scattered throughout the world who have about as much contact with the crew as you. I got an email reply when I wished Justin a happy birthday last year. That's pretty much it.
But if you manage to say hi to anyone, I'm sure we'd all love to hear about it!