The internet is both wonderful and terrible. For instance, it enables patients to learn a lot about their own diseases, and if they are discriminating, sometimes even to save their own lives. But medical information, or opinion, on the internet has probably already killed far more people than it has saved: the fact that Thabo Mbeki, the recently deposed President of South Africa, found a site on the internet while browsing that convinced him that AIDS was not caused by a virus, and that therefore treatment of HIV with drugs was harmful, resulted in untold premature loss of life that it will take many years for the internet to balance by lives it has saved.

Theodore Dalyrmple in the New English Review.

Or, sometimes you’re the windshield, sometimes you’re the bug.