Simply put, no matter what people say in this thread, people give them for whatever they think they need to give it.
Some are crusaders looking for scammers, others just dont like the other etc etc.
It is just abused.
But you are lumping people that disagree as people that just hate the people, its the tactic that is the issue! Not gonna go at any other aspect, think you mean well.
Negative reps are here to publicly show how "(un)trusted" a user is. Trustable people get +reps, and and other people trust them. Scammers get -reps, and people don't trust them.
We are talking about abuse of ratings in paticular, title might have thrown you.
you even dont know what abuse is. just face the facts: you dont like certain ratings because you dont agree with them. doesnt mean someone got abused... get over it