One of the obstacles is that currently under our present system we would have to sue, for example, Google, to seek some sort of an injunction, a Mareva injunction or something like that. Google would then defend itself as any defendant would by saying it's not liable. The challenge with that is that instead of working together and coming up with a solution together, you end up having very opposed views because you're in a court case dealing with it.
The other issue is that there's always a debate over whether the injunction is actually available.