Business idea: a service that investigates your stack (with your permission) and verifies that you're not likely to be sued.
Patent law has transformed into basic extortion, and it's interesting (for some definition of interesting) to see that such extortion is actually legal in the United States.
As for the legal extortion using lawsuits. That's an old game in the US, there are people who make an active living out of suing somebody for something and offering to settle. Get a copyright infringement letter from somebody? I guarantee you that the settlement offer will be much less than defending yourself in court, even if they are mistaken in their accusation. It's an industry that people have been abusing for years, if not decades.
The courts themselves have to do something to stop this but I see no signs they are interested in reducing the need for more resources to be spent on things the courts need to address these cases.
I'm genuinely curious and concerned.