Except I don't have a warehouse in the United States. All I have is widgets located in Europe, I put them in a box and I ship them using parcel post to anyone anywhere in the world.
Yet you are saying that I am now beholden to US law because I interacted with a customer located in the United States ...
1) Any warehouse you have in the US that is part of your widget operation can be seized (this is the equivalent of the .com being taken over)
2) The US can request extradition of you and it is up to your countries courts to decide if they will comply