A stranger posed as an old classmate and asked my family for my mobile phone number. ...

It's better to be careful when hurting others. According to criminal psychology, first, see who is at home and when. If there is no one, you may suffer. Second, it may be a prank to scare you. Have you ever thought about offending anyone? Third, someone may have made a mistake and caused a misunderstanding. But be careful in everything. If necessary, call 1 10 to wish you peace.