Dont be short sighted
You may be a Christian but you are a short sighted one. First of all its very easy to filter out adult sites already but more importantly as an industry we support voluntary filtering...I dint want your kids viewing my paysites, they dont have credit cards.
My problem is the potential for government abuse, governments blocking .xxx altogether, states mandating that in order to provide ISP services you must block all .xxx domains etc.
Remember my Christian friend, the same end of the pencil that erases my smut can erase your scripture.