What do people think is achieved by booing? It's not like it's going to do anything to prevent cheating, and it's not as if someone's going to shrug off a formal punishment and only realise the severity of their actions when they get booed. It seems to be more a matter of people wanting to reduce complex situations to heroes and villains and then petulantly vent their anger at the fact that nobody's perfect.
What is achieved by booing? It validates even further that the man is a cheat and a disgrace to his sport and his flag, his final moment of glory has been forever tarnished by the audience who reminded him in no uncertain terms of their contempt for him, he can now retire and join the roll of shame with other 'Athletes', such as Ben Johnson, Carl Lewis and Linford Christie as cheats and failed champion.
However I don't remember George Osbourne being a drug cheat?
To be honest if you widened your disapproval of drug taking beyond sport you'd never go to another play again - in another thread we were discussing actors who dislike being in Stratford because it is so boring, hence the drug taking culture there of the recent past with actors snorting lines of coke off the main stage.