yeah rep systems are graet for a sitee, pretty much all big sites have them. there a good way of people keeping down on the level of stupidity and spam and incourage people to make good post and contribute wortwhil info.
but on the other hand without admins taking part in how this is run it will turn really bad. for example theres alot of idiots here and those idiots like other idiots so they'll just start repping ecah other, so in the end awfull poster will have high rep and the system will be useless.
rep is used to determine the good posters from the bad, and without the admins watching over it, it's not worth it.
how this is done is the admins will set some people they recoginse as good posters with high rep. now these respcted members will the speard that re around to other good posters get them higher rep and neg people who are bad posters. of course the admins can just takeaway or give any member a certain amout of rep too, so it not that hard to keep it running smoothly.
i'd like to see that here, it's fun too