The current reputation system doesn't look right to me. I have the impression a lot more posts are voted down then voted up.
You should encourage people to speak up on a forum, and imo you will not accomplish that by allowing people to give everybody a -1. Even helpful posts or normal questions are being voted down by someone (and that someone could be only lurking).
I am sure the setting of the reputation system can be altered. Might be something like: you need to vote 2 posts up to be able to vote 1 down.
You should encourage people to speak up on a forum, and imo you will not accomplish that by allowing people to give everybody a -1. Even helpful posts or normal questions are being voted down by someone (and that someone could be only lurking).
I am sure the setting of the reputation system can be altered. Might be something like: you need to vote 2 posts up to be able to vote 1 down.