Yeah, that's a big problem. Do they just go further underground or scatter about. I think, generally, we're stuck in a world where almost any piece of information can be shared with anybody. We have to learn to adapt to our new reality.
I guess the argument here would be one of difficulty of access to information/communication like this. That if you have to jump through enough hoops you'll see fewer incidents like these.
That said... it becomes a bit of an evolutionary battle.
I think the web is going to evolve towards more completely secure, anonymous content & communication, not less. And as the web becomes evermore entwined in the fabric of our society we'll only know better how to navigate it. I think the government can give chase, for a while, but ultimately the web wins. (which you could still argue is a good thing, overall)