My Dad rarely scolded me when I was young. Instead, he would use tactics like these. I wouldn't call them 'scare' tactics, because he didn't really say them to scare me... it was more like he was putting some facts out there for me think about, so that I would make a conscious decision about things. I've always believed in his way of talking to younger people - scolding them off only damages your relationship with them.
They really can think for themselves if you give them the chance.