What about auto color(red obv. or another color to leave red for self-tags) for anyone who kills you, if not already tagged green (for troll friends friendly fire accidents.)
Go "OH NOES this would break the anonymity of sneaky assasins/snipers" on me, but it would be a fix to the cant-click-circlerunning-guy-to-tag-red and could be ok with the "color of name-tags should be about ingame experience and not about shared lists of thousand nicks"-guys
I don't have a problem with namecolor not active, but i hate it when i can't tag someone because of him/her moving.
So with this kind of way we would avoid a copy-pasted list or people punching in thousands of nicks from a list with the command suggested by the OP
Other idea, could be combined with the first one: Enable name-colorization, but only one color: green - so we could still tag our gangmembers and allies green, without meeting every new member/alt in person, but avoid the "this guy I never met is red because he is in my textfile, I should shoot him"
I'm aware of the rules - I should post this in a new thread - will do.