Earlier quoted context omitted.
> one of the main reasons that patent trolling is so successful is that the cost of settling is smaller even than the cost of winning a suit. Is the underlying reason for this strategy the low costs of settlement, or the extremely high costs of lawsuits? What if the value of a patent really is only a few thousand dollars? Note that this very tactic is used by big companies to avoid licensing valid and useful patents…
I'm a software engineer. Consequently I have to admit ignorance about this concept of a valid and useful patent. All I ever see is patents that hinder the Progress of Science and useful Arts. Are there really enough valid and useful patents that we should hesitate in our fight against the rest?
You run into a lot more useful ones at the intersection with the physical world where some protection lets a company get a chance to be the first one to market and reap some benefit.
In some industries (Pharma) it's really the only practical approach due to the extreme development costs (easily over 1B$) and often cheap production costs.