In the scenario I proposed (shutting down DNS services), commerce might be able to continue as many companies probably directly use Internet Protocol (IP) addresses which would probably still work in a DNS shutdown. But the average consumer who types in www.whateversite.com would not get through, and email would probably be disrupted.
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I'll have to concede to your greater knowledge on the subject.
If bambi can shut down the net for us common folk - so be it. If he believes that will stop free speech , well, he can believe as he wants.