Technically, I think you are correct on all counts. Almost anyone can pursue any course of action if they are simply determined enough to do it and spend all the resources necessary to make it happen. But the question is.... will they? Would it be profitable? Generally speaking, only up to a certain point from my clearly anecdotal point of view.
On account of treaties such as WIPO and the preceding Berne Convention, it doesn't matter where you live with respect to where the copyright holder lives: all they need to do is retain counsel in *your* country to bring initiate a legal claim and/or file an action with the courts. On that note, a lawyer in any state can contact you to make a claim on that person's behalf but, if they actually want to take you to court, they have to do so in a relevant jurisdiction i.e. one where you have either personal residence or business interests. Out-of-state lawyers often partner with in-state lawyers, or they can obtain pro hac vice admissions if the particular state allows it.