Couldn't a rogue government easily take down the internet this way? Seems like if one guy in Indonesia can take out Google by accident, a government entity could do the same.
It might work for somebody like China, where they have two network interfaces, so can make all Chinese networks think they are Google on one interface, then forward things on to the real Google on the other. There might be a good reason for them to do it, too, because they are also likely a trusted CA, so could forge SSL certs, too.