Add player levels to /who

[FluffNStuff]

Would it be possible to add player levels to the output of /who, especially in PVP maps. I asked about finding other players levels, and while there are work arounds, such as attempting a trade, I think this would be a useful addition and ~possibly~ easy change. Example:
/who
hunnyhunter-61, hunnysniper-65, fluffnstuff-65

[Swimmingstar]

Player1 killed Player3
Player1 killed Player3
Player1 killed Player3
Player2: Lol
/w
Player1-66, Player2-61, Player3-56
Player3: HA! Level 66! I'm level 56!