This is idea is based of the Mcmmo ranks like, Swords,Axes etc.
There are some servers who do this,
for example, For slayer can can choose either one of these
Slayer -Swords
- Axes
- bows
- hands
Contractor -Excavation
Tamer - Animal taming
- Fisher
builder - Woodcutting
- Repairing
Miner -Mining
-Repairing
Farmer- Herbalism
- fishing
I've seen many ways of doing this, By clicking a sign or asking a admin+ to change it for you, It will take quite alot of work, but it makes it more entertaining
*edit* It could be like- [Member] [name] [Rank]