Goliath a (the gubbermint) is going after Goliath b (the porn industry), and Mr. A is armed with nerf guns. People like porn. People watch lots of it. Fans are not victims- they're consumers. You want traditional values- well porn is as traditional as you get. The only industry older is prostitution. People like sex. They like having it, they like thinking about it, they like watching it.
The people standing against the gubbermint in this case will include:
The porn industry
Media giants (who are supplied by the porn industry)
Free speech advocates
This is a no-win scenario for the gubbermint. If anything, it'll increase demand, much like when sites proclaim that they are "Banned in Thirty Countries". Sure, those thirty countries are perdominantly Muslim or have no concept of free speech (shout out to China, y'all!), but your average user sees that and says, "Damn, that's got to be good!" "Facing US Government Prosecution" will be just as salable a label.