Researchers say that lack of sufficient sleep is associated with risky behaviors such as smoking, drinking alcohol, being sexually active, using marijuana, lower physical activity, and feeling sad or helpless.
“Insufficient sleep on school nights is common and is associated with participation in health risk behaviors including substance use, fighting, and consideration of suicide,”
http://thechart.blogs.cnn.com/2011/09/27/sleep-deprived-teens-take-more-risks/