The year Moneymaker won, some friend of mind told me he read an article about some "nobody" who won the WSOP. I was pissed as hell to find out because back in those days it was relatively easy to keep it a secret.
Nowadays it is impossible to expect people to keep it a secret.
1- There is live reporting on every poker website
2- The final table is broadcast live on PPV. It would be like expecting boxing fans to not talk about a boxing match that was broadcast on PPV because they wanted to wait 2 weeks when it will be re-broadcast on HBO.
3- Once the event is over the results will be reported on all the major outlets (TV, Internet, paper) well before it is on ESPN.