It'd be more interesting to allow some sort of optional rating system which feeds into something like a gaming matchmaking system. People who consistently send out good reviews will get a rank of "A", for example, and be matched to others with similar rankings.

That way, even low-quality posts ("i liek that u have a logo") can be accounted for, without treating them like spam. As the reviewer becomes better at reviewing, they will see an increase in their ranking and better reviews.