maybe they were doing laundry and that was the only clean clothes they had left.
i've always wondered too. makes me want to pick a fight with them in bars.
I was always told by my Marine buddy that wearing your utilities in public was frowned upon and trashy. He always said, "If you are going to represent the military wear your dress blues... end of story. No self respecting serviceman would wear his utilities in public."
Good question. I've often wondered this myself after hearing the above statement.