It would be impossible for a youth to get in accidentally as most demand credit cards or upfront cash before allowing access. On the Net, kids won't come across adult-oriented sites unless they deliberately look for them and know how to download and decode the material. And this can be easily prevented by having their access blocked and activity online logged by a program on their home computer such as Nanny. But again, these services are not really part of the Internet and the young person's activity can be easily monitored and controlled by the parents with the service's software. In reality, most of the adult pictures on the Net are of poor composition, time-consuming to decode and paste together, and, frankly, boring.
Most adults check it out a time or two to see what the fuss is about and move on, never to return.
If X-rated material is your kick, you'll find better quality at the nearest magazine stand. Adventures like the Internet are going to bring out the best and the worst in people. So, if you are going to be involved in the Net, as in life, be prepared to run into both. But the Net, like radio and television, is a neutral technological tool, in itself neither good nor bad. It is how we choose to use it that determines the final outcome.