Asahi v Superior Court of CA

Simple awareness that putting your product into
the stream of commerce may sweep the product
into the forum state does not make it an act
purposefully directed at that state. Remove your
contacts in a state.
Considering the international context, the heavy
burden on the alien defendant, and the slight interests
of the plaintiff and the forum State, the exercise
of personal jurisdiction . . . would be unreasonable
and unfair. - Sandra Day O'Connor