Consider a common situation.
A patent troll owning US patents finds a fresh target, decides to threaten it, his lawyer looks up the company address and surprise! it's not in the US. Let's say it is EU-based, say in the Netherlands, or perhaps in Hong Kong. His next step?
The company does not sell a product to US customers, but is purely online service free of charge for end-users, earning through advertisement.
Would the patent troll go to a US court and attempt to sue an overseas company? Knowing the company would most likely ignore any ruling since it is only subject to their local laws? The nature of the company does not imply anything illegal or immoral.
Btw, does being hosted in US change anything or it is the incorporation location that only matters?
P.S. It is not an attempt for a US-resident to hide from US courts. I'm not based in the US in the first place and incorporating in US is certainly not the first choice when it comes to it.