You can't be a patent troll if you're actually making a product. The entire "business model" of a patent troll is to make money off of lawsuits, not from actually selling things.
A friend of mine was working in the Hustler store in Cincinnati in the late 90's/early 2000. You know how Larry Flynt opened a store in Cincinnati, despite the legislation passed specifically to exclude his businesses? They had boxes of butterfly, rainbow, and unicorn stickers in the basement. Every single sticker was inventoried separately, so legally, the Hustler store didn't have a majority inventory of adult items.
There's nothing preventing a sufficiently large company from being some fraction X and another fraction Y.
All systems have bugs, which is why simpler systems are easier to manage in the long run.
Yes. Though of course, if a big company that was actually making things, bought a patent troll and just let the get on with their business, I'd still be inclined to call the new subsidiary a patent troll.
I don't think they're trying to "crush" Samsung by extorting $15 per handset, I'd say they're trying to maximize their revenues by charging as much as they possibly can without triggering a lawsuit.
If they wanted to crush Samsung, they'd insist that Samsung sell WP7 phones or nothing. If their patents hold up, that is their right.