I got into it at a young age, and the fact is, its all to easy to click the "Yes, I am over 18" button and erase your history and temp internet files at home.
Its quite a sad agair I think when the entire idea of http and the internet (the freedom of information) breaks down because of governments and people (mainly a load of over-protective parents who are scaired by the media), and thus prediters have more of a chance, because the teenagers are all the more desperate for information... Its not fair (stamps foot)...