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Here is one huge list by the "search engine spammers of the year" epinions. 15 of the top 20 sites listed are theirs:
How does one get in that same mode where mass submissions (spam) is acceptable by editors?
The epinions listings have been added by staff. They're being worked on, and will eventually be integrated better into the directory.
Fortunately in this case, ODP is not a place frequented by the average surfer. Those people generally go to AOL Search, Netscape Search, Google, or any of the huge number of ODP's "downline stream" where different algorithms are applied, so placement in ODP isn't as important as one might think.