From the Washington Post article:

https://www.washingtonpost.com/news/the-intersect/wp/2015/09...

> Positive ratings post immediately; negative ratings are queued in a private inbox for 48 hours in case of disputes. If you haven’t registered for the site, and thus can’t contest those negative ratings, your profile only shows positive reviews.

This seems like this would strongly disincentive anyone from registering for the app in the first place.