Pornography is a pernicious danger to society for many reasons, but I don't think the government is well-suited to solve the problem. The government should be limited to preventing one person from forcing or coercing another into doing something he doesn't want to do, and eliminating pornography doesn't fall into that category.
The root of the problem isn't that people are making pornography, it's that people have a desire to consume it -- and the government has no power (or authority) to change what people desire. The solution to pornography is individual and personal. God commands us to control our own thoughts:
Colossians 3:2The government won't be able to eliminate pornography; there will always be "earthly things" to distract us from the holy thoughts and purposes God created us for. As a Christian, I must depend on God daily to give me the strength to focus my mind on the course he has laid out for me, ignoring the tempting scenery that could so easily lure me off the path.
Set your minds on things above, not on earthly things.
As with some other issues many on the right want the government to "solve", pornography isn't a physical problem with a physical solution: it's a spiritual problem with a spiritual solution. It isn't easy to turn our attention away from things that offer us obvious, immediate pleasure, but such pleasure is ephemeral and passes away moment by moment. The rewards of God last forever.
1 John 2:15-17Without spiritual understanding, why would anyone refrain from immediate gratification? Life is short, and there's no guarantee you'll breathe another breath; absent faith, only a fool would put all his eggs into the basket of the future. Many faith-less philosophies build up a morality on a circular foundation, but in the end they all come down to using the force of government to control what people think and do, "for their own good".
Do not love the world or anything in the world. If anyone loves the world, the love of the Father is not in him. For everything in the world--the cravings of sinful man, the lust of his eyes and the boasting of what he has and does -- comes not from the Father but from the world. The world and its desires pass away, but the man who does the will of God lives forever.
More on the political side from Justin Katz, who says:
So here's a thought: if the public really is as enamored of smut as Ashcroft's critics believe, why not campaign to change the law? If porn is such an obviously good, or at least neutral, thing, why sidestep the actual issue — involving those six guys and some unknown millions of dollars — by substituting rhetoric about the war? Come out from behind the computer desk and lance the issue head on.