I am not a fan of patents, mainly because of issues surrounding eligibility, implementation and abuses. (edit: which would be all fairly straight forward to re-adjust and enforce, if there was a will to do so in the legislature)

I do, however, reserve the term "patent troll" to places who practice acquiring patents and suing others based on those patents, as a way to make money, but don't actually build anything with those patents. I do not understand why it is even legal to do that, that is most certainly easy to fix (edit: I reached a point where I think greedy people = psychopaths, destroyers of the world).

So the Wright Brothers, the Edison, the Christiansen, and many others, actually did build from their invention. They did use their patent to prevent others from using it, which is basically what a patent grants its owner. Patents don't give you the right to proceed with your invention, they give you the right from excluding others from doing your invention.