Why, is it illegal? It's for sure scummy, but from what I've read about patent trolls, usually they get to continue until they eventually run into someone prin

Why, is it illegal? It's for sure scummy, but from what I've read about patent trolls, usually they get to continue until they eventually run into someone principled (and bankrolled) and then they lose their patent due to prior art in many cases. I've never heard of them getting in actual trouble.