I am often shocked by people. Several times when I'm out with people I'll think, "Are you kidding me?" because of something one of my acquaintances does.
I will be the first to tell you, I am not the sweetest person. I definitely speak before I think. I say a lot of stupid things. Especially in family situations. I still have the reputation of 13-year-old Susannah, hands on hips, telling everyone to MOVE IT! when they get in my way.
But I will never do some of the things I see. Small, tame example: unless I am trying to bug my nephew Luke, I would never walk up to someone and eat off their plate, out of their hand, or whatever, competely univited. That annoys me. It isn't the food, it is the sudden intrusion into my world, my bubble.