Got any data to back that assertion? The article cites one loser who could just as well have become addicted to Home Shopping Network.
Sex, drugs, and rock and roll: we know that drugs are bad, and that libertine sex causes STD epidemics and, in some cases, death (an AIDS epidemic would not exist in a monogamous society). Porn is a subset of libertine sex and sexuality. The likelihood of unbridled porn having harmful effects upon individuals intuitively seems high, but I know that is not scientific.