Internet activity that promotes illegal actions is already illegal, and there are laws in spain allowing for these raids and closures.
Edit: "Getting away with it" is mostly a question of "which side are you on?". Independentists and most non-government supporters think that what's going on is outrageous, whereas government supporters are totally fine with it.
These laws where passed mainly to fight against piracy (think thepiratebay). Of course the excuse was that it was a tool against terrorism and pedophilia though ;)
Edit: "Getting away with it" is mostly a question of "which side are you on?". Independentists and most non-government supporters think that what's going on is outrageous, whereas government supporters are totally fine with it.
These laws where passed mainly to fight against piracy (think thepiratebay). Of course the excuse was that it was a tool against terrorism and pedophilia though ;)