Ability to rename people's names shown in friends-list

Hi
I can't really remember names except for those something special is associated with and that's why i often have to ask my friends who they are (yes i know that's sad). So my idea is that people should be able to change the names of their friends shown in their friendslists or add a small comment behind them to easily remember who they are. What do you think about it and how good is the chance of getting it realised?

you could just select the friend from your friends list, and open their profile. The last tab of the profile lets you add as many notes about them as you wish.

no no no I like this idea...come on please. I'd keep griefers ON my list just for the names I'd give them.

Seriously though it can have benifit if you could like say have a little nickname:
Krazzora Zaftig (Goddess)