There are constitutional limits on when state courts can exercise jurisdiction over people not physically located in the state.
https://en.wikipedia.org/wiki/Personal_jurisdiction_in_Inter...
> Personal jurisdiction in American civil procedure law is premised on the notion that a defendant should not be subject to the decisions of a foreign or out of state court, without having "purposely availed" himself of the benefits that the forum state has to offer.
> Courts have held that the greater the commercial nature and level of interactivity associated with the website, the more likely it is that the website operator has "purposefully avail[ed] itself" of the forum state's jurisdiction. [..] In contrast, a passive website that simply makes the information available to the user will be less likely to have a basis for personal jurisdiction.
(By the same principle, even an interactive website can probably avoid jurisdiction if they block IP addresses from the state, and don't encourage people to evade the block or anything like that.)