The US Government does not "OWN" the Internet. SOPA would set us up to look like China or Cuba. Is that how we want the world to view us?
The movie studio you use as an example would be out of business if it did such a thing. If you offend the online community, you offend a great number of people who can organize faster than you can. Witness the congressional withdrawal from SOPA after the blackout demonstration. If you think congress is spineless, businessmen are boneless wonders.