Well, I got this idea when I remember this system in BFBC2. This system allow to not change your profile name, when you want to move into another clan/faction, what is much easier. I think this may be usefull and for admins too. So my suggestion:
1) Make an option in cRPG character cabinet, where you can enter and save tag.
2) Tag will be automaticaly shown somewhere near the player name in the game.
3) Similar way prefix/postfix for Strategus
I dont know this system inside, maybe admins could find a better way leading to the same result.