You may think future clients will see the righteousness of
  your action [..]

And you will be wrong. When this story gets told, a future client will more readily identify with the client in the story, simply by virtue of it also being 'the client'. They will consider how this situation could come about and will come up with all kinds of reasons why someone could reasonably not want to pay you. What happens if your work sucks and you get into a serious disagreement? They would want that to be resolved via the usual ways, without them being harmed by you abusing (nb. their thoughts, it's irrelevant whether they are mine) your powers. All in all, it will mostly rub off in a bad fashion.