Hmm - it isa good idea in principle, but as Dorian mentions, it can be a legal minefield.
All it takes is fo some dealer to become upset over certain comments, or pottentialy liebel statements, and it can spell trouble. This is the same for any internet forum, and it doesnt matter even if we restricted the said section to registered members or otherwise - a dealer could still sign up, see something they dont like and get shirty.
You would hope that dealers would take any negative posts on the chin and do something about them, all in the spirit of improving service, and relationships with the customers - but we all know thats not how the real world works.
Its certainly something that the mods/admins can discuss.
great idea, and thanks for taking the time to suggest/discuss it