There is a feedback system on FD where members can leave a rating for other members.
When a transaction is completed (item take, received or withdrawn), the members can rate each other. It is via a 'thumbs up' or 'thumbs down' selection in the chat section of the site. All ratings are anonymous.
If a member clicks the wrong 'thumb' by mistake, they can correct that by clicking the button again, which will cancel the rating.
If the transaction has been a simple 'yes please, can I have it' type message and no chat has been generated by the other person, the rating can be done but will not shown to others. If there has been a two-way chat generated then the rating will be shown. This is to stop people giving a bad rating simply because they didn't get an item.
The ratings last around six months, so they fade away over time. On average across the whole system people give 89% thumbs up and 11% thumbs down.
Trashnothing has a thumbs up equivalent, but not a thumbs down.
There is also a separate system-generated feedback facility, where members can see statistics of usage of other members. See Feedback for an explanation of how this works and what information it gives.
Members can see their own ratings and stats in the settings https://www.ilovefreegle.org/settings under 'View Your Profile'.