“When I was ten, I read fairy tales in secret and would have been ashamed if I had been found doing so. Now that I am fifty, I read them openly. When I became a man I put away childish things, including the fear of childishness and the desire to be very grown up” --C.S. Lewis

Most ISPs don’t do that, content owners do then send complaints to the ISP who forwards them to the user. ISPs aren’t going to spend money on losing a customer.