Judges in the US routinely dismiss frivolous cases[1] with prejudice. And in fact even filing a frivolous case can result in fines or jail time for contempt.

Judges in the US routinely dismiss frivolous cases[1] with prejudice. And in fact even filing a frivolous case can result in fines or jail time for contempt. So no, you can’t in practice sue someone for anything. [1]: https://en.m.wikipedia.org/wiki/Frivolous_litigation https://en.m.wikipedia.org/wiki/Frivolous_litigation