Final answer:
Taking another player's items in a game without permission is generally considered cheating or theft, which is against most online game rules and community guidelines. Consequences for such actions can range from account suspension to banning.
Step-by-step explanation:
The scenario you're describing would be considered violating a rule in the realm of video game ethics and depending on the game's specific rules, possibly the game's terms of service. If you take another player's items without their permission in a game, this is generally considered a form of cheating or theft, even in a digital context. Many online games have rules against stealing from other players and would see such an action as unfair or disruptive to the game's community and can result in consequences like account suspension or banning.
In a broader sense, if the game does not have express rules about theft but the community has established norms, you could be violating community guidelines. Furthermore, some games may have mechanisms to report players who engage in behavior that is considered cheating or griefing, which covers a wide range of disruptive behaviors, including theft of in-game items.