IANAL, I don't think it's true that just anyone can sue for wrongful termination. In the US, the general rule is at-will employment, which means they can fire

IANAL, I don't think it's true that just anyone can sue for wrongful termination. In the US, the general rule is at-will employment, which means they can fire you whenever they want for whatever reason. There are some exception - discrimination, the family medical leave act for new parents, retaliation against whistleblowers, and employees who refused to break the law. That's about it. Sure, an employee COULD file a lawsuit alleging that the employer broke one of those rules, but, if it's made up, they're all easily disproved except discrimination - which means nobody would bother with it, unless they had a grudge and money to burn, because there would be no payoff.