Cheating on Prediction Games - John Doe !

How does John Doe win all predictions : 

Add all leagues to predictions from all competitions and add administrators who don't put exact times on matches, he is on stage when matches are played live and changes the score during the match, I caught him many times in Greek prediction, challenge cup, CEV cup, turkey division 2, etc.

Or he adds the matches just before the start of the matches so you don't get to predict the matches, he did in Turkey, Greece, Romania, etc.