One thing I hate about this Spartan# thing is that when you have a name like that. Someone can say Spartan and 20 people reply. For excample in your server list you might have three players.
1 : Spartan117
2 : $p@R1@n13832
3 : Master Cheif Spartan
By saying Spartan you can refer to all there! However, if you have unique names...
1 : Double T
2 : Time
3 : Blitzarang
The closest you can get to referring to two is T, which probably no one will reply too.