We're concerned about the children, but for enough money, you know, whatever.
Make it a 100 bucks. If the child can get its shit together enough to get a job and fork over the money, they are grown enough to access the naughty stuff.
I'm just SURE that there won't be any FOIA'able lists of everyone who pays to look at porn. Surely something like that would NEVER be abused in any way... right?