This is like putting a price tag on every Ones and Zeros generated by your computer. If it aint paid for, you aint getting it. Every single digital signature, watermark or any identifying code embedded in a particular "information" has a price, and if you want it, you must pay for it. Otherwise, they will shut you down. I can only imagine that the US will find labor and cost saving devices in order to fully enforce the law, of course they will not send agents across countries, why do that when they can send packets.. tons and tons of it, until the server fails and is rendered "down"
The horrific aspect of the law is the enforcement. Imagine a scenario where both the SOPA and IPA are passed and enforced. A forumer of philmusic quotes something from a website like Encarta Encyclopedia (assuming free wikipedia.org is already down) or an interview of an artist from some music website, Philmusic will automatically get the boot for facilitating piracy and unauthorized use of Intellectual property. Even if Philmusic servers are here in the Philippines, a US judge may summarily order to shut down philmusic without prior notice and hearing, plus the action is In Rem which means that it is enforeceable against "the whole world" no need for personal service of summons, summons may be done by mere PUBLICATION.
With the deep packet inspection feature of the law, the "user" who had committed the said infringement is put to the mercy of the FBI and US COURTS.
SOPA and IPA if passed will definitely change that way we use the internet, and now I can almost hear big brother breathing from the otherside of my telephone..