I can enable with the click of a mouse, but no. It's a useless feature, you people should be self motivated (and coming from an internet hipster like me, saying karma is worthless is saying something).
This has been suggested to many times, and being denied for to many times for the reasons Somone77 said.This causes trolls to -rep random people because they think it's funny, or friends +rep each other even though they didn't earn it.reputation is something you can earn mentally by doing good things. If you are really so good, you don't need to show it physically as people would notice you have a good reputation by your deeds, not by some random reputation level.