Rule-Sharking is defined as ..
"Attempting to force a non-existent rule or policy on an opponent who has made a small and repairable error."On Dueling Network as examples for Rule-Sharking are named ...
- Not allowing an opponent to Set an accidental Normal Summon (e.g. Snowman Eater).
- Not allowing an opponent to activate/resolve a mandatory effect since they "missed the chance".
- Asking an opponent to admit defeat after they have drawn an extra card by accident without shuffling their hand.