I hate to say this, as I'm not 16 any more (I'm 43), but I honestly think it's elements of the older generation not understanding the Internet and how it has changed the structure of society.
I was talking to my parents about technology and how it has changed the way we learn and use information, that learning how to find the information you require is now more important than learning it parrot-fashion, but they couldn't get past pornography and how it hurts the little children. And these are two retired social workers, both people who would have, in the past considered themselves sexually liberated.
But they're terrified of the Internet, because they simply don't understand it.
I was trying to explain how I think we should now be looking at educating children as early as possible the rules of "Netiquette", even alongside the basic rules of in-the-flesh etiquette that we all begin learning as we learn to speak, as most people accessing the web for the first time now have no people helping them understand how to behave in an online environment. Hence the proliferation of trolling and bullying, and the spread of the alt-right.
Porn is BAD! How do we stop kids seeing porn?!? HOW DO WE GET THE HORRIBLE INTERNET BACK IN THE BOX?!?