Of course the crew is at fault. Maintenance set them up by disabling the take off warning system, but if they had done their checklist everything would have been fine. We all need to think about how easy it would be for this happening to us if we don't stay disciplined. Don't ever rely on your checklist to do what needs to be done. Have a final scan of flaps, gear, trim and spoilers on every take off or landing, it only takes a second. Do it on short final or cleared onto the runway. I did it once at 200 ft once landing and noticed we didn't have the autospoilers armed then noticed we hadn't done any of the landing checklist. We had it all done in the last few seconds. It was basically all done except for arming the speedbrakes but checking the basics to back up everything can be good some days when you are snoozing.