The method they are employing is unethical and legally questionable.
That’s what the courts are for. And the State Bar. If an act is legal and people don’t like it based on personal ethics, too bad. What prosecutors do for example is to threaten a defendant to plead guilty to lesser charges or face added charges whether or not those added charges will stick. They would need to be defended and very expensive to do so and there is a risk that a person can be convicted. A defendant doesn’t like that but the law says if is legal to do it.
If you want to me mess with someone’s copyright, that infringed person can pursue legal action. You can run but you cant hide from the owner. Don’t like it, sue them back.