Children should not idolize celebrities who glorify drug addiction. Celebrities who glorify drug addiction are very dangerous in the way they influence their fans who are still children. Children who look up to celebrities that idolize drug addiction will aspire to replicate that behavior and begin to experiment with drugs and in some cases develop their own addiction to drugs which may lead to death or legal troubles.
The idolization of celebrities is rarely a positive influence. Celebrities don't typically face life with the same expectations as normal people do. Children idolizing these celebrities is rarely healthy. Add the drug addiction into the issue, and there is even more reason to ensure that the child doesn't idolize that person.
I think it's sending the wrong message to a child when they are admiring someone who is addictied to drugs and publicly stating that they are on them, I think there are plenty of upstanding celebrities who are not on drugs that are much more suitable role models for a child.
It is my opinion that children should not idolize celebrities that glorify drug addiction because this idolization can lead to those children becoming more likely to take part in illegal drug use. By emulating these celebrities, children are growing into teenagers with a predisposition towards becoming heavy drug users or addicts.