it depends from where you come from.There are plenty of rural areas in Sri Lanka today, for example where an average kid will not have free access to the internet. X rated movies and porno mags have existed for decades now and as a five year old though I didn't even know what a computer was I knew what "dirty scenes" in movies were cos certain cousins and relatives forgot to press the pause button fast enough!
My daughter on the other hand doesn't have free access to the internet and is supervised by myself or my husband all the time.So again its cos the place she is in doesn't allow her that kind of knowledge.
And years ago where we were from my mom would never let us go out alone without a grown up accompanying us but I see here in Qatar many kids freely going out to the shops alone. Why? Because of course Qatar today is safer still than Kolpitty, my hometown, was even two decades ago!