Which of the following actions is unacceptable in tournament conduct?

Engaging in collusion to manipulate match outcomes is unacceptable in tournament conduct because it undermines the integrity of the competition. Collusion involves players working together to compromise the results of matches, which not only affects their own chances of success but also impacts the fairness for all participants in the tournament. Tournaments are intended to be a test of skill and strategy, and collusion violates the principles of fair play. Tournament organizers and judges take such actions very seriously, and they are strictly prohibited under the rules governing Magic: The Gathering events.

In contrast, the other actions listed are considered acceptable and often encouraged in tournament settings. For instance, tracking life totals using a notebook is a standard practice that helps players manage and keep accurate records of the game state. Respecting other players and the game is fundamental to maintaining a positive tournament atmosphere. Requesting a card verification from a judge is an important step to ensure adherence to the rules and promote fair play. Each of these actions contributes to a healthy and respectful tournament environment, unlike collusion, which directly violates those values.