This Yahoo article may fall into the "Duh!" category, but unfortunately there are a few people who still need to read it. More unfortunately still, they won't read it.
What can we do? Think about the people we know to whom this article is addressed. Send them a link, if they ever check their e-mail. Show them a printout, if they don't do e-mail but do know how to read. But in most cases we will need to do more about these people. Go after them. Aggressively demand that, if they are going to "party" in ways that involve alcohol and other drugs, you will be their designated driver...or else be their self-appointed "nark"!