Hi HMD team!
Thank you for posting the new forum guide and information on ranks and points, that's going to be very helpful to lots of people. However, now that you've revealed how it works there's a chance that some people may try to game the system. Most worryingly, some people may use the disagree and flag buttons to troll people because they know it will reduce their points - could this cause a derank, so that people lose privileges?
In other forums I've been involved in the idea of "negative rep" didn't work because it could be used in this way so the feature was disabled.
I'm sure you'll keep an eye on how it's being used, or abused, and change it if needed.