> Why didn't the students' parents talk to their own kids about the survey?
Maybe the parents weren't told that the survey was asking about potentially illegal behavior and wasn't anonymous.
Maybe the survey's true nature was buried in ambiguous terms or lengthy legalese.
Maybe the survey was opt-out instead of opt-in, and most people took the path of least resistance and didn't bother to do anything with it (if their kids even remembered to give them information that was sent home).
Maybe the parents weren't told that the survey was asking about potentially illegal behavior and wasn't anonymous.
Maybe the survey's true nature was buried in ambiguous terms or lengthy legalese.
Maybe the survey was opt-out instead of opt-in, and most people took the path of least resistance and didn't bother to do anything with it (if their kids even remembered to give them information that was sent home).