It doesn't actually take that much time to moderate spam posts as long as people report them. What then happens is that in the mod cp, they get a little a flag thing on the post with why people say it needs deleting, then they go check and delete it. This in all can take between 5~15 seconds depending on the length of the post etc. so with a small group of around 5 mods/admins who, between them, are pretty much on the whole day, it doesn't add up to a lot of work. The problem of then relying on rep is that they don't have a clear, visual way of judging whether or not rep is deserved or if a member is just "boosting" up people to Jr as the only way to find out would be to go to the member, find all his rep's to non-Jr's then check the posts that he rep'd (which could be a lot of he is an active member) and then remove the rep from the users they think were unfairly given and send the member a warning (I just used he in the example referring to the member because it's easier
) which could range between a minute and 5. Also, Fawaki "disabled the rep" a long time ago because people were "abusing" it, where some people just didn't like some people and -rep'd any post where they did anything wrong, and other users liked each other and +rep'd any above normal post to try and stop/boost them to members (used to be 30 rep = members). Creating a similar system would be less abused like that was, as it is members who are trustworthy (on whole), but friends of their's that join etc. will get the same sort of boosting that happened before and members would still -rep people that they didn't like, because they are all human (except R0b0t1).
I think the ideal way to filter out the spammers/leechers from the good users, would simply to have an IQ Test to register and they have to get a certain amount to pass or close registration and make it invite only from Community members and SRL Members upwards.
By reading this signature you agree that mixster is superior to you in each and every way except the bad ways but including the really bad ways.