Well, if anyone wants to comment from a legal perspective--that's always helpful. Problem is that from what I've heard from lawyer types, no one wants to post legal advice publicly and associate their name with it. From the advice I was given, it is not good for GH to have naming and shaming lists. And as I've already brought it up before--it's also bad from moderation standpoint.
Not only do people not have all the facts (only the parties involved know what truly happened, and even they may not know all the details from each other), but other people join the chorus and casually toss around threats. So we have slander combined with threats of violence or action from uninvolved parties--that's never good from any standpoint. And if any other people are involved and named (like roommates), without actually having anything to do with a scam, then their names get dragged in and tarnished. And again, we have to go through all that and through complaints we receive in PMs and see who's right, who's not right, what's out of line, what isn't. It's entirely too much responsibility for everyone who is not directly involved in a transaction gone bad.
Again, the best method of dealing with transactions gone bad is staying on top of your financial institutions' rules, PayPal rules, not missing any dispute deadlines. Even having a public list of names is not going to prevent all the bad transactions, as people can come under new names, or people without negative history can suddenly do something incorrectly.