I doubt that I often have an "I'm too busy to notice you" look in public. But I'm fairly sure I wear it often when I am alone! Hee.
The fact that you mentioned "innocent" look in the eyes for INFPs, Gauche, was an "aha" moment for me. It doesn't happen often anymore but for much of my life I've been surprised by people's assumption that I am naive. That explains that.
Also probably explains how I got away with so much stuff when I was a kid! I always wondered about that. . .