So I was in a Wisconsin airport coming home and I saw someone walk down the terminal with a "Strike a Pose" t-shirt. Since part of it was blocked, I asked him if that was the Desmond Howard shirt and it indeed was. We proceeded on our ways with a short "Go Blue!"
I usually reserve a casual "Go Blue!" only when I see Michigan apparel far from home (i.e. not in the Midwest or Florida, which is essentially Michigan South). But I had to compliment this choice of wardrobe since it clearly was diehard fan to own this shirt.
That being said, I've also worn Michigan apparel in Europe and in Asia, and have been "Go Blue'd" before. When do you guys say, "Go Blue," and when do you just pass by with a smile because it's not unexpected to see our colors in a given location?