I wonder why this case was filed in the Federal court for the central district of California. Isn't the eastern district of Texas usually the preferred place f

I wonder why this case was filed in the Federal court for the central district of California. Isn't the eastern district of Texas usually the preferred place for patent trolls[1]? In this case, the plaintiffs wouldn't even have to go very far since the Plano, Texas address is already in that court district. 1 - http://www.dallasnews.com/sharedcontent/dws/bus/stories/DN-patent_31bus.ART.State.Edition1.3ccb54a.html http://www.dallasnews.com/sharedcontent/dws/bus/stories/DN-p...