They are better off vaping than smoking cigarettes. Vaping does not contain all the harmful substances and toxicity of tobacco smoke. Teenagers experiment with illegal things that’s part of their development and normal from a human perspective. IMHO vaping is the least harmful thing they can do.  There’s no evidence of harm  to health by vaping nicotine. Nicotine outside combustion is similar to caffeine and harmless to human health. Most people worldwide who smoke started as minors, in this case data confirm these youngsters will not even start smoking which is a real beneficial factor to public health and their own health. Education and truthful information is the key. Tobacco is the culprit, not vaping.