At that point you're just saying "trolls are bad", because you're not offering any way for the law to differentiate between a "good" NPE (our lone inventor) and

At that point you're just saying "trolls are bad", because you're not offering any way for the law to differentiate between a "good" NPE (our lone inventor) and a "bad" NPE (the trolls). How do you limit the bad without also limiting the good?