They end up playing the system not the game, by duping the ref into making wrong but favourable decisions.
他们欺骗裁判做出错误但有利于本方的判罚，这是在钻空子，而不是在比赛。
英语百科
Gaming the system
Gaming the system (also referred to as gaming the rules, bending the rules, abusing the system, cheating the system, milking the system, playing the system, or working the system) can be defined as using the rules and procedures meant to protect a system in order, instead, to manipulate the system for a desired outcome.