I dunno keeping it policed would be a challenge, would have to set up some pretty strict guidelines up front I think. Otherwise it could just become skewed, by fanboi's or people just looking to bash someone.
Keep to some kind of post format at least:
- vendor name
- product
- issue
- attempts to resolve issue w/vendor
Posts w/o that info would be deleted posts that went overboard and turned into bashing get removed also. There is nothing wrong with blowing off steam but a vendor feedback channel isn't really the place imo. Vent your anger with the vendor and just post up the facts on here, and let everyone make their own opinions of the vendor/poster.