I'll list and describe a few websites where consumers can express
their dissatisfaction. All of these sites are free to consumers. As
a measure of popularity, I searched each site for complaints about
#1 on my list is Complaints.com. Here consumers can post complaints
and businesses can respond. The site design is simple and clean, with
just one panel of Google ads at the top of some pages. Emailing a
complaint to the offending company is optional. There is a search
function, but no topical index. This site has the highest PageRank of
those listed here in the Google Directory page on consumer complaint
websites, and it's listed first in the results of a Yahoo! search for
"consumer complaints." Wal-Mart complaints: 366.
my3cents.com is similar, but has more ads. It has a topical index as
well as a search function. The site accepts compliments as well as
complaints, but complaints predominate. Other consumers can comment
on posts, and the site compiles ratings of businesses. Wal-Mart hits:
866, not all complaints.
Another possibility is the Rip-off Report. The home page claims over
three billion hits. The website design is loud, featuring pop-under
ads for the site's guide to rip-off revenge. Wal-Mart complaints:
PlanetFeedback has a variation on the theme. Its primary mission is
to help consumers communicate complaints, compliments, questions, and
suggestions to businesses; consumers can also choose to make edited
versions of their messages public. Only the latest 100 letters to a
company are publicly available. Wal-Mart letters: 6339.
Google Directory page on consumer complaint sites
Yahoo! "consumer complaints" search result
I hope this is a satisfactory answer to your question. If you need
any more information, please ask for a clarification.