Heh I used to do that every week when EverQuest was in it's peak and I was a teenager! These days I get scared of deep vein thrombosis and whatnot. That and my chair is crap.
Considering the very quote you've included says Guinness was aware of and allowed this use of breaks "cheated" is hardly accurate. Like any gamer he's playing the system.
Point is it's hardly non-stop gaming by any definition if you sleep for several hours at a time while you're at it...that article pretty much describes my normal life for the month or two after I dropped out of uni.
I fully agree that with breaks lasting multiple hours it's hardly a non-stop record, but that's a fault of Guinness as a ruling body for allowing it and the Daily Mail for making a sensationalist headline. My point is just that Okan Kaya wanted a Guinness world record for "non-stop gaming", checked with the requirements for such a record, followed them, and got his record fair and square. Whether anyone actually puts any faith in the Guinness world record due to the breaks being allowed is a different matter that isn't his doing.
In fairness, there was that dude in Asia that keeled over and died after 40 straight hours of gaming. Clearly there is a definite health risk involved with extreme prolonged bouts of gaming. There is no way Guinness is letting anyone do the challenge without taking breaks. Its likely this is as close to non stop as your going to get for an official record.