Jon
You pretty much summed up what I feel about the hobby -and why I do it (aside from the joy of building something up from a bunch of plastic parts).
Building a tank or other vehicle somehow makes me feel closer to the people who manned -and died in- them. You can touch history, and also helps to understand how the technology worked (many details became evident only after I built a particular vehicle, and the research helped to understand how things work). Some of my co-workers thought I was a childish weirdo who likes to play with toys, a nerd, or a militarist idiot, or all in one. Despite my fascination with AFVs and airplanes, helicopters, I am very much a pacifist. Go figure.
But since I realized people tend to look funny at me when I mentioned my hobby, I stopped mentioning it. (By the way, the movie 40 years old virgin quite reinforced the nerd status of figure painting and model building. I guess we are.) That's why I'm uneasy giving my full name on forums like this: a simple google brings up all my messages in these "militaristic", "Nazi-loving" forums (when an "outsider" sees a tank with a Nazi flag displayed on top, he assumes we like them), plus that two or three publications I have... I'd rather not have people know my hobby. Especially if they are about to hire me.