Until what age is it still appropriate to call someone a ‘kid’ and use it as an excuse for their bad behavior? While it might count as a cute nickname, allowing someone to act like a kid should be restricted to a certain age period, and after that, it should definitely not be considered cute anymore. Picture this scenario for example – A ‘kid’ decided to prank his father by covering all his work and office supplies with duct tape, and essentially ruining important documents that his dad needed…