In the US, pretty much anyone can sue anyone else for any reason. While a judge may eventually throw out the lawsuit (for various reasons including frivolity, e

In the US, pretty much anyone can sue anyone else for any reason. While a judge may eventually throw out the lawsuit (for various reasons including frivolity, etc.), being sued generally requires the services of a lawyer to at least bring up the motion to toss the suit. Lawyers ain't cheap (at least the kind that are effective). Furthermore, there's the whole watchlist thing - if the EU has decided against you, they can make traveling outside the US very inconvenient.