It was implemented in the past. During the 4.77 era. But the program that made it possible, flshell, had a tendency to crash the server when a command was used.
Also, part of the game experience is to make your own rep. You start as a civilian, and work your rep up from the ground.
(If you find any mistake in my English, please let me know via a PM)
(Really, I speak terrible English, so please, tell me if I make mistakes. I'd like to improve it a bit )