My problem with the whole thing is that, while I dislike having my hobby associated with murder, the prosecution's charge is, in all fairness, dead on.
D&D does make us better storytellers. It makes us better at covering angles, and eliminating holes in a story. We think things through better, and anticipate other people's responses. I'm sure 95% of us have heard other people lying to a lawyer, or the press, or the like, and thought "Why did he say that? If he'd said <blank> they wouldn't have had anything to go on."
Not to mention we hang out on internet message sites, and exchange all sorts of ideas with each other. I'm sure at least one person on this board knows all about the insanity defense, and the best way to convince a jury of this - that's how diverse a group we are.