Team Russia
Russia operated one of the most ludicrous state-sponsored doping schemes in history. The ICARUS documentary revealed the extent of this insane operation that saw secret service agents and scientists work together. This was mass doing on a scale that the world had never seen.
The IOC responded by banning Russia from competing at the 2018 Winter Olympics as well as the 2022 Tokyo Olympics. However, they allowed Russian athletes to compete under a neutral banner in a pointless gesture. Shockingly, this decision went ahead (via Yahoo!).