I knew a family growing up in which the kids were not allowed to pour their own milk, not even the 16 year old. The one time we stayed at their house, I got the big scary owl eyes from the kids when I dared to grab the milk and pour my own. When they told me that we were not allowed to do that, I just looked at them and said "Your kidding, right?" They were not.
My ex father in law would leave a $4 tip for a $70 meal. Every time we went out with him for dinner, we would wait until he turned to leave the restaurant and make up the difference.
My step-sons mother rationed his milk because they were "so poor" and would yell at him if she thought it was being used too fast. Then we would find out that she had gone to Florida on vacation, or a cruise or something or other. So every time he came down, he would grab the tallest glass in the house and fill it up. We just felt so bad that she thought vacation was more important than a growing boy having his milk.