I respectfully disagree. Initially it will be status quo because members like you and I know how we feel about the credibility of other current members. But as new members join it will be harder to "track" them. It will be a constant sifting through process for anyone not on the board frequently.
Perhaps this process will be beneficial as it will require each user to research more deeply before making decisions. If you're not only having to research the credibility of the lab but of the user reports, it seems you would stand a good chance to learn a lot. A rank doesn't tell you if the user has been given conflicting reports or caught lying before, even a positive negative system can be misrepresentitive of the credibility or knowledge of the user. Just a thought. I'm nobody here so lol