Porn feeds human trafficking and sex slavery around the world.
That rises to the level of compelling public interest; i.e. government involvement.
Starve the beast.
Yeah, and oil fuels terrorism, so lets just ban that too.
We already have laws against trafficking and slavery, and we cant police the world (well, some big military conservatives and big environment liberals think we can).
Starve the beast indeed, remove power from the federal government.