And how on Earth (literally) are the Republicans to control the entire World Wide Web?
Most of the moralists behind such plans will so quickly be outed as avid porn consumers themselves that they simply will have to cancel their project in order to avoid maximum embarrassment for themselves.
And anyway, you simply can´t forbid alcohol, you can´t forbid drugs, you can´t suppress sex and porn. No matter what serious consequences exaggerated consumption or even addiction of either of those may have, banning them just doesn´t work. They will always find illegal ways of production and distribution that will be more expensive, more exployting, and more dangerous for anyone involved.