Miley Cyrus Bong Video, Who is responsible of her act

Miley Cyrus Bong video is phrase that is at top on Google trends. The news is that the video of 18 years old Miley Cyrus showing that she smoking a bong has been leaked out. During a party at her home in Los Angeles, she was inhaling the drug when TMZ captured the scene and then posted its video on internet.
The father of Miley Cyrus, Billy Ray Cyrus commented on twitter that I am so sad. He added more that sorry guys, I have no idea.
Few months before Mileys parents announced divorce after the 17 years old relationship.
Now question rises here who is the responsible of Mileys act. Why is she making herself drugs addict?

At the end I would like to suggest to the parents that they must monitor the activities of their children.

Miley Cyrus Bong Video, Who is responsible of her act