For this, we need to start using (much more) secure ID tech, so you really know who is submitting, and prioritize those who have made good quality submissions in the past. Sadly, this may negelect "unknown" authors, but such is life.

Also, we may need to recruit more code authors / wanna be code authors to act as code reviewers more of the time, perhaps following the model we use in our commercial operation where all authors also act as reviewers.