You mean a 365-day a year religious boarding school with restricted Internet access? Maybe. But I don't imagine there are too many of those.
The fact is, if your kid has friends, there's nothing you can do to stop their exposure to this filth. All you can do is acknowledge that it exists, and do what you can to teach your kids how to handle it and make good decisions.
Outside of locking your teenagers in the basement without a computer, or sending them to a year-round convent, the fact is that kids need to have electronic devices for many reasons -- to access school websites, collaborate on school projects, and to enable parents to keep in touch with them when they are out of your sight.
What I'm finding is that this stuff is so pervasive that it actually seems to be a turn-off to my daughter and her friends. How many boys does a 13-year-old girl have to see jerking off online before she starts having the classical middle-school girl reaction:
