That is a thing that I have always thought about in the case of my own reviews. I think some kind of feedback feature or function would be great in reviews: maybe own thumbs up, some kind of rating, or possibility to comment. At least a comment section would be great because a review can raise some questions. It would be more rewarding if a reviewer could see if her/his review has some effect or relevance among our community.
We have the yearly feedback by Els post on "Year in Review". But that is rather high level and only way I made the cut was hiking Laponia in Sneakers :)
I am not a fan of disliking posts. Every post is valuable and Els already filters out what is substandard. Likes could also be a weird currency. To me, we have the whatsapp group and the forum for shoutouts. Maybe we should create a sticky forum post for positive feedback on reviews? Or I was thinking on allowing comments on reviews.