Each player can choose to have his gamer tag hidden or shown to other players. Disabling gamer tag also removes the green/red indicator light from your skin.
I figure this might fix the long time standing performance issues of managing a ton of gamer tags on screen as well as make gameplay more interesting with only some people having gamer tags.
Some pros:
You could pretend to be on the other team
or try to hide more effectively.
Some cons:
Probably works best when friendly fire is enabled.
Possibly annoying
