The problem with porn doesn't really come from accidental exposure to particularly 'extreme' material, I think. That might just be a start. The core problem is,

The problem with porn doesn't really come from accidental exposure to particularly 'extreme' material, I think. That might just be a start. The core problem is, for young people (adolescents) and adults alike, the deliberate search for porn (with hormone-fueled determination, it'll get around technical hurdles) as part of an addictive pattern of behaviour. To counter that, there's no substitute for voluntarily and consciously avoiding it. This may be helped by education: knowing why it's bad, and also knowing why it seems appealing, i.e. sex education and basic addiction psychology, as well as knowledge of the other porn-associated problems as informed by one's broader moral framework. Good luck.