No Big Deal, But Google May Have Promoted a Contest to Get Kids’ Social Security Numbers -
This year we started accepting doodles from kids even if their school hadn't registered for the contest. To help us keep entries distinct and remove duplicate entries from any particular student, we asked parents for limited information, including the last 4 digits of a student's social security number. We later updated our forms when we recognized that we could sufficiently separate legitimate contest entries while requesting less information. To be clear, these last 4 digits were not entered into our records and will be safely discarded.