[notyourday]

This is the icky part:

* by appearing in the US court defenders would put themselves into the court's jurisdiction. It is a virtual certainty that the defendants will lose.

* by not appearing in the US court the defendants would get a default judgement against them. A third party might claim that a court ordering ISP blocking becomes a kangaroo court, but that third party has no standing in the case and unless for some strange reason a judge decides to do more than just follow a default procedure whatever is asked in the lawsuit would be granted to the plaintiff.

Edit: In theory, a plaintiff can ask as a part of a relief to make a defendant walk around a block for three hours, making donkey noises and if a defendant does not show up it may very well end up being awarded as a part of a default judgement. By appearing, the defendant most likely can get this part of the remedy tossed but at the same time by appearing the defendant would place itself into court's jurisdiction.

So it is a no win case for a defendant.