The ODP doesn't review, judge, or list businesses. So, look, that means it's really ALL RIGHT with us that your client is an amoral, sadistically vicious, paranoid con man who wouldn't recognize an ethical option if he ran over it with a steamroller. Really, don't let that concern you at all. So don't try to convince us otherwise, not that there is any way you could. It's OK, it is really and truly NOT A PROBLEM.
All that aside, the ODP reviews websites and lists the ones that have sufficient unique content. For commercial websites, the "unique content" bar is pretty low -- a site about a local business has to have more information concerning that business than you could find at, say, the online yellow pages. If people can find out who to call or where to go to get personally ripped off, and bounty hunters and process servers know where to go to meet the proprietor, and marshalls know roughly what kind of property can be siezed -- then, roughly speaking, that site has a good chance of being listed.
And, not that it's relevant in _this_ case, but when we do get websites for ethical businesses, we'd look for the same kind of content (It's not OUR concern that in those cases the same information would be used by community leaders rather than FBI agents.)
What IS relevant in some cases (again, not necessarily this one) is that a site designed to promote one or another affiliate scam, gets decorated with an almost invisible veneer of local information. Such sites don't get listed -- not because they are scams (as they often are), not because the local information is false (as it sometimes is), but merely because the unique content of the site is hard to find.
Just to summarize; don't worry about your client's reputation or character ... just make sure that the WEBPAGE emphasizes AND features ITS UNIQUE content.