Should you be able to have your name be in color when people view it with TAB, and be Red or Blue on the kill info on the top right of the screen like in Call of Duty?
I think it would add a bit of variety, but it would need to be restricted - multicolour names can detract from the 'realism' or 'fun' or 'whatever' I reckon! In CoD and Trackmania, for example, it's rather over the top.
However, maybe it's just because I don't know how to do it myself, and I'm jealous