I've noticed this trend also, I asked google and got this response from wikipedia:

> An individual case often begins with a perfunctory infringement complaint,[31] or even a mere threat of suit, which is often enough to encourage settlement for the nuisance or "threat value" of the suit by purchasing a license to the patent. In the United States, suits are often brought in United States District Court for the Eastern District of Texas, known for favoring plaintiffs and for expertise in patent suits.[53]

Source: http://en.wikipedia.org/wiki/Patent_troll

id Software, the subsidiary in question, is based in Texas. Oculus also has an office there (although not their main one). Obviously ZeniMax are going to pick the venue that they think they have the best chance of winning at, but in this case there are actually some pretty strong connections.

thats because thats where people who want swift legal procedure goes. Its used by patent trolls too.

ID software was based in Dallas from what I know. Carmack and Romero were the original founders. This smells like Zenimax is trying to make a fast buck.