I know that France have banned certain sites too, although I am not sure which ones. As you say, all this will do is to push it more and more underground, but it won't stop people doing it.
On a side note, it never ceases to amaze me how much of my tax goes to pay the policing of these things uniquely to protect the fiscal interests of big business. What about all the unsolved murders, robberies, burglaries? Oh wait. They only happen to "little" people who don't fund political parties...
