I think it's a great idea especially for the unfortunate children that have druggies for parents
So that if their parents have drugs lying round the house, they might be less likely to want to eat a tablet or drink something once they have been told the danger of it/what it could do to their body
Also children are good at guilt tripping people, I know when I smoked, my daughter kept coming home and telling me that smoking was going to kill her Mum, me! So, what did I do? Gave up, of course
Obviously they don't or can't just do it for that reason, there are plenty of other reasons too