That and it's a one-time counter claim for this specific situation. From the title I presumed that they had somehow made a 'generic' weapon that could be used to shut down any patient troll.
If whatever company that is suing on patent grounds is also producing software (like this current case), then they are not a patent troll by the most common definition of the term but just plain aholes.
Patent troll is a pejorative term used for a person or company who enforces patents against one or more alleged infringers in a manner considered aggressive or opportunistic with no intention to manufacture or market the patented invention.*
http://en.wikipedia.org/wiki/Patent_troll
(this article is referenced: Alexander Poltorak. "On 'Patent Trolls' and Injunctive Relief"., ipfrontline.com, May 12, 2006)
Just being a jerk with a patent dosen't make you a patent troll.
Physician, heal thyself.