Would you stop your kids, anywhere from age, i don't know 10 to 16yr old, from staying up uber late when having friends over for the night, birthday party/sleep over? no. Would you stop your kid playing Warcraft 24 hours a day every day of the week months on end, of course.
Would you stop your kid doing it ONCE, in a clearly not every day situation when all his friends bring their computers over and its essentially a lan party? I wouldn't.
Remember if you read the story he, firstly, did sleep at least a bit, secondly, the dad knew they slept a bit and ate at LEAST twice that he knew about and thirdly, his convulsion is not down to the gaming, at all.
Has everyone on this entire forum had at least one ultra long day when eating a little less than normal, yes, without question, thats life, so no its not a deadly thing to do. Did his father check in on them, clearly he knew they ate, knew they slept at least a few hours, wheres the problem here at all, I just don't see it.