Regardless of opinions by the left and the right. I commend Bristol for trying to be honest and sincere, and warn others to not make the same mistake.
Current estimates are that 2/3's of new births are a direct result of alcohol impairment and virtually anyone from any walk of life can easily fall into this "substance abuse" unprotected sex trap.
source: http://www.patheos.com/community/philosophicalfragments/2011/06/23/the-sexual-assault-of-bristol-palin/