Punch me and call me Jesus, I didn't even know. o.o
To me, it just seems people have an issue with the comments and people using it to flame each other and people overly using it on friends.
The first issue about comments is void because... people can still flame, so it's just the friend issue. Make it so you can't rep the same person more than once a week, and before you can give them another rep in the next week, make it so you have to give out ten reps to other people.
Limitations are good sometimes.