We need to have some way to control post quality. On SE, this is primarily done with voting, and there are score thresholds set at which various things happen (high scores give you badges, low scores knock you off default question lists).
I propose we use voting as well; simple up/down will suffice. We probably don’t need score threshold triggers for MVP.
We can also use closing/reopening for questions for QC; questions that aren’t up to community standards can be closed and requests for more information added until they’re up to scratch.