Earlier quoted context omitted.
> This is important because otherwise UK fines may be enforceable in US courts. UK law is generally unenforcible in the US except extradition agreements for crimes commuted while residing in the UK . That's not the case here and there's no agreement that applies to this case.
It is possible to enforce UK judgements and fines in the US, though my understanding is that it is not simple or guaranteed. I suppose the action 4chan is taking in US court is exactly to avoid this possibility.
I am curious as to how that could possibly work. Is there some trade agreement that requires the US to respect UK court rulings? Generally the US has sought to distance itself from any kind of foreign influence or control.