A Chinese man who chain-smoked his way through a marathon was disqualified for smoking on the course
(www.businessinsider.com)
On the one hand, seems he earned his place. On the other hand, they should have stopped him running when there was still a chance to protect the (maybe literal) sensitivities of other racers and observers. Enforcement only after he finished is just stupid.
Put another way, if he does it merely to do it, as many runners do, what's to stop him doing it again and again, knowing his personal results will not only be shared with him, but likely the papers?