When kids reach puberty age they begin to seek their own identities, and choose the lifestyle that they regard as cool lifestyle. If they regard the cool lifestyle is sport, they will active in sport competition. If they regard the cool lifestyle is active in social project, they will become volunteer in social organization. But if they regard the cool lifestyle is hedonistic lifestyle, yeah, they will become hedonists.
What is the remedy for hedonistic lifestyle?. .... Another lifestyle which is better.
Show those hedonist youth that there is another cool lifestyle, and make them interested to live in this another lifestyle. In example, show them about creative youth who make innovation and improvisation in technology. Make them see the creative youth as the cool youth. So they will begin interested to move from hedonistic lifestyle into creative lifestyle.