I have a solution!
Like in Call of Duty... introduce 'PRESTIGE' where after reaching the maximum amount of rep, it reboots to 0 but the member gets some kind of little tag next to the user name to indicate his/her prestige level, like for Prestige 1 make it something like a dildo, Prestige 2 a douchebag, Prestige 3 :baconsalt: etc, etc, etc.
No, I'm not drunk... still working on it though