I like the reputation system, it gives you an idea of what people think of your posts. Some people need to man up though, I see people who get 1 or 2 negative reps and they go and report it to an admin then make a thread complaining about it. If alot of people are neg-repping you for a particular post maybe take a look at that post and try to see why so many people neg-repped you, not all of them are abusers.
Anyways, its just a few coloured bars, if you don't like getting neg reps you should just disable it. People are taking it way too seriously. The system can be great however I think some people are being immature and not using it properly. I honestly don't mind if it was disabled, sure I like it but with all the complaints and abuse of it, I think it'd be better for PC just to disable it.