Along with the launch of Season 3, Call of Duty: Vanguard received an updated version of the Ricochet anti-cheat, which flags cheaters' computers at the system level using a special kernel driver, making winning matches virtually impossible for them. Cheaters will also be removed from the global leaderboards.
Cheaters can no longer see or hear fair players, and cannot even deal damage to them. The cheaters themselves, however, can still be seen and heard.
Activision promises that Ricochet will safeguard fair players in Modern Warfare 2 as well, which will be released before the end of this year.