Unmeasured Economic Activities

From your everyday observations list two unmeasured economic activities. Now, I don't want anyone confessing to any criminal behavior (some of which is unmeasured economic activity) but I do want some thought put behind your answers. Your examples don't have to necessarily involve you directly. They can be simple observations of someone's behavior (corporations count too). After listing each example I want you to answer the following questions:

- Why is this activity not reflected in the GDP numbers? - Do you feel that this example represents a 'significant' amount of unreported output? You define what is considered to be 'significant' and why.