This problem first occurred during my first days of Eurobricks lurking. Brickset is a wonderful site with lots of useful features. But in my opinion the "Top Reviewers List" is not. Now, in the middle of all the good, helpful reviews are a bunch crappy spam reviews that kids use to get to the All Time Top Review Slot. These spammers review sets that they obviosly don't have, and they do things like give a set an automatic five just because they like the theme. But there is hope. Brickset has made it so kids can't post things like "Kool dis set rockz!!!11!!". And maybe soon a new generation of reviewers will work hard to make quality reviews as best as they can. Believe me, as bad as it has gotten, there is still hope for Brickset.com.
Thanks for listening.