Not that concept, just our specific implementation.

If person A decides they don't like you, they can sue you over and over and cost you tens of thousands of dollars and never get that back. If you don't reply to each with a lawyer and spend time and money fighting, you lose even more money.

There are some bandaids like having someone declared a vexatious litigant, but that also requires time and money. If you owned some small business, someone could certainly bankrupt you before you could stop them.

I don't know exactly what a solution looks like, but I do see this as a problem.

IANAL but my guess is that it costs money for the defendant to respond to a lawsuit, so if company A wants person B to stop doing something, even if person B is within their legal right to do so, company A can still force person B to stop, because either person B goes bankrupt fighting it or person B ignores it and company A has the judgement in their favor.

Because (if I understand correctly) the judge side with the plaintiff without looking at the case : https://en.wikipedia.org/wiki/Default_judgment.

Because an innocent person can be bankrupted by repeatedly having to respond to frivolous lawsuits.