Forum Moderators: open
Reason being, the weight carried by the listing helps the offending site, also they are ranking and not showing the content they are ranking for, thus spaming, but below their serp is the google listing, which is actually the dmoz listing...... bah, I think you get what I mean. : )!
dmoz editorial decisions should be entirely independent of Google ranking issues.
If a site's content has changed to something that is no longer appropriate for the category where it is listed, e.g. a domain redirect to a shopping directory, then there is a specific thread at Resource Zone (see this forum's charter) to report these cases. It's in the Abuse Reporting forum.
Hope this makes things clearer. :)