I remember Madcow had them on her show and was talking to these people during her two minute's hate (damn AFN and its 'balanced' programming), they just seemed stunned that the courts didn't rule in their favor.
Is it sad that their daughter died? Yes. Is the psychopath who did it being held responsible in court? So far, yes. Then why would you go after a company who was acting within the limits of the law and had NO IDEA that the guy was crazy any more than anyone ELSE did prior to his doing it?
The only reasons I can see, is either you're capitalizing off your child's death and trying to get a windfall (AKA the st. Trayvon of the skittles gambit) or you are pushing a political agenda. Both of which do NOTHING to bring their daughter back.
I'm sure their lawyer advised them that this was a possibility, and they didn't think it would go that way, because 'pain and suffering'!!!!!!!!ELEBINTY!!!! Now they have to struggle to pay the bill that THEY brought about seeking 'social justice'.