Some times, I have the impression, that patent trolls are in the mouth of everybody to cover the fact, that they are more of a symptom than a real problem.
With bad patent-troll legislation, it could be possible to make things bad for legit inventors. Just think, somebody has invented something and is seeking investors. Now comes a big corporation and steals his invention and builds it. With a patent reform that does ignore such people, he even could be blocked to defend his patent (what is currently difficult enough, because he needs much money to do that).