I totally agree with you about the problem with "go-with-the-flow" rating systems. You should not simply be able to perform well by picking highly rated stocks. This is one of the problems we're trying to solve.
Our rating system actually has an internal pricing mechanism which is designed to drive the ratings toward zero and prevent piling on behavior. If you just follow the crowd you won't do well as a real investor and you won't score well on our site.
Judging by the feedback we've been getting that's not nearly as obvious as it needs to be and we're trying to figure out how to best show that.