The only practical approach is to give teenagers the tools necessary to deal with this and make sensible decisions based on their own values and respect for others (as if being a teenager wasn't hard enough already). However, good luck in getting PE (Porn Education) taught to ten-year olds, never mind being able to filter out all the agendas of concerned parties and being able to create the materials necessary with essentially nothing to base it on - in terms of the effects it's having on teenagers development.

The ship of consequences sailed a long time ago on this one and it's not clear where it's headed.