If you don't do it already, please note that it's really good etiquette and IMHO important to rate and comment on a review once you submit it after editing.
This boosts the contributors' confidence, gives feedback rather than the subtle silent undercover changes you make on their review, and gives the review a jumpstart of momentum as far as popularity.
It's a courtesy to the contributor and to the site, really.
If you have some severely constructive criticism, consider sending a message to the user so as not to taint the wall for coming potential commentators.
This boosts the contributors' confidence, gives feedback rather than the subtle silent undercover changes you make on their review, and gives the review a jumpstart of momentum as far as popularity.
It's a courtesy to the contributor and to the site, really.
If you have some severely constructive criticism, consider sending a message to the user so as not to taint the wall for coming potential commentators.