Not all schools teach sex ed; that's a huge problem with a lot of places. Schools and parents sometimes try to teach abstinence-only education, when that type of education does not prevent sex, it only serves to prevent education on safe sex. The internet is also not a perfect educational tool, as not everyone has access to it (or there are security programs on the computer that prevent users from researching certain topics, often sex-related), and not every source on the internet is completely accurate. This is why I would disagree with you - it is, at least partially, her parents' fault. One cannot expect every child to educate him or herself, especially when there is no guarantee that they will have an introduction to the topic prior to an actual sexual experience. Furthermore, not all STDs are forever. Some are, yes, but there are some that are completely curable. This mistaken belief, again, is evidence that the internet is not always the best source for correct information.