You can sue anyone for anything. Doesn’t mean you’ll win, just that you can try.
While I agree with the general sentiment, just to nitpick, if someone keeps filing frivolous lawsuits as a form of harassment, some jurisdictions can find them guilty of barratry.
Barratry (/ˈbærətri/ BARR-ə-tree, from Old French barat (“deceit, trickery”)) is a legal term that, at common law, described a criminal offense committed by people who are overly officious in instigating or encouraging prosecution of groundless litigation,[1] or who bring repeated or persistent acts of litigation for the purposes of profit or harassment.[2]
While I agree with the general sentiment, just to nitpick, if someone keeps filing frivolous lawsuits as a form of harassment, some jurisdictions can find them guilty of barratry.
https://en.wikipedia.org/wiki/Barratry_(common_law)