How about a little suggestion to help improve this system that I don't see would be tough to do.
Tell us when, where and who we hit with a positive, negative reputation point. That way we watch our 24 hour time limit hits. Also allows us to know if we need to rep someone else before we can hit a person we previously hit that had another recent post.
Another idea would be nice would to be able to see who actually hit you with a positive or negative reputation. This may bring griefing but like DDO there is an ignore option and this could help avoid some of those anonymous negative posts.