Earlier quoted context omitted.
Censorship is always abused. Once the infrastructure is in place, it's used for all kinds of things. They always start with the usual "think of the children" or "it's against terrorism" spiel, but sooner or later it's used to sweep anything inconvenient under the rug.
Most developed countries already have the infrastructure in place for fighting piracy, and I don't see it being used to "censor dissidents"
If you give people a powerful tool, they tend to get funny ideas.