Maybe im missing something here, but is it possible to remove player tags in customs? Im working on a map/game that would require teams and the players call tags removed. The last time I did this was during Reach where the option was simply a toggle in the game settings. Is the setting specific to a gamemode or is there a script that can be made to remove them?
closest you could get is scripting player damage to kill the player just before death, but yeah nothing will change the ability to see enemy gamertag in crosshair.