punishing somebody without or before having an absolute judgement... I'm not American, but is that possible under American law?
As far as i know, if it's a threat to national security, then yes it's possible. But it has to be ordered by the Department of Justice who will instruct the FBI to knock on your door and confiscate the servers.
But as far as the "business owner" (for example in this case, Verisign) is concerned, i think they already have provisions stated in their "User Agreement" with anyone who registers domains with them.
For example, when you reg with Godaddy, there's a user agreement there which says you can't use the domain for hate or racist purposes, illegal porn, counterfeit selling, etc. In effect, Godaddy can shut your domain down if they see your domains are being used against their "TOS".
Perhaps it's almost the same as the "self-policing" done by Google, Facebook, or Twitter, when they shut down user accounts that they believe violate their "TOS".
I don't think Google even filed a case in Court when they terminate people's Adsense accounts with no explanation required. They just kill your business like a switch, and expect you to beg for mercy.