What in your view makes parents think that drugs is the worst problem teenagers have ?are their fears justified?

Drug-takers become uncontrolled, agressive, insane. They know no fear and no borders. The can be cruel to their family members and friends following a purpose to get money for a new dose of drug. Person who takes drugs destroys his organism,exposes himself to danger to die in a crack house, get an AIDS, die from an overdose. So I believe that parents fears are absolutely  justified