Destro: A few more notes on the topic:
First and foremost, thank you for all the feedback :).
As our design and dev teams are working hard on some future updates and improvements to the forums and website (surprise, surprise ;), we're looking closely into all parts of it, including the rep & rating systems, to see what could use some fine tuning :). We've seen some interesting ideas in this topic as well as in your emails and it's one of the things that we'll be discussing in our design meetings in the upcoming week.
Now, as with any other system, there's always a possibility that someone will try to abuse it and it's out job to monitor and prevent that. If we'll find users using fake accounts or cheating the system in any other way we'll take appropriate actions.
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Piotr K.
Design & Dev Team
I contacted gog about this during closed Beta and wondered about it then with the negative rating ability.
A simple solution would be to Change the Negative Button to a "Hide this Post" button.
Leave the Positive Button as is; that way users could only give positive "Thumbs-Up" to other users while still being able to hide a post if they wish.