This is a thing, and in the context of the article too. In UK, if an employment tribunal finds you’ve wasted the tribunals time they can and do order costs paid for both the tribunal and other party. Odd they don’t mention it.
It’s also on the court system to leverage procedure correctly to add safeguards against the kind of behaviour you describe.
I understand anecdotally the US system is more open to abuse of this nature, but I don’t know the details. This article though was specific to UK.