The problem is that those lists can not be easily published on-line for everyone to see because of legal reasons.
I don't believe that's the case. There's no reason what so ever for not having a thread about people that are selling fake pins. Do you honestly think one of these criminals is going to try to sue the board because we list them here?
I've said this numerous times before, this is, literally, the only collecting-based forum I'm on that does not have a blacklist of people to avoid to protect it's members. I've been on dozens (probably 100s) of forums for other hobbies and collectibles, and not one of them has ever had a problem listing eBay names, posting auction details (including screen-shots of the auction listing so they are preserved permanently), common forum names and in some cases even the Email address and city/countries they are in to help protect their members and actually STOP the activity...
If we never tell our members who is selling the fake pins (in an open way that all can see), we will never be able to stop them. No one thinks to come here and say 'Hey, can someone send me a list of shady sellers on eBay?' before they start buying them. Every new member that's joined since I've been a member here that realized they got burned bought pins from a seller that everyone here knew to stay away from... But for some reason they aren't allowed to publicly post that information. How many times have you seen a new member join up all excited about a great deal they got on a huge lot of 100+ pins shipped straight from China and eager to trade/sell?
I don't know where this 'legal concern' came from, but unless you intend to use the list to slander people you don't like (that would be a problem), there's absolutely no risk of any legal action. In fact, if the person really is selling fake pins, you'd WANT them to file a lawsuit against you. That would make them appear in court, and you could notify Disney that someone that's counterfeiting their property will be showing up in court. They'd love to know about that.
But, to date, in nearly 25 years of being on the internet and joining collecting groups/lists/forums, I've never heard of one even being given a C&D for having a list of people that have ripped off other members. The people doing the criminal activity are not going to through themselves into a court room.